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<h1>Source code for google.cloud.bigtable.row_data</h1><div class="highlight"><pre>
<span></span><span class="c1"># Copyright 2016 Google Inc.</span>
<span class="c1">#</span>
<span class="c1"># Licensed under the Apache License, Version 2.0 (the "License");</span>
<span class="c1"># you may not use this file except in compliance with the License.</span>
<span class="c1"># You may obtain a copy of the License at</span>
<span class="c1">#</span>
<span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="c1">#</span>
<span class="c1"># Unless required by applicable law or agreed to in writing, software</span>
<span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span>
<span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="c1"># See the License for the specific language governing permissions and</span>
<span class="c1"># limitations under the License.</span>
<span class="sd">"""Container for Google Cloud Bigtable Cells and Streaming Row Contents."""</span>
<span class="kn">import</span> <span class="nn">copy</span>
<span class="kn">import</span> <span class="nn">six</span>
<span class="kn">from</span> <span class="nn">google.cloud._helpers</span> <span class="k">import</span> <span class="n">_datetime_from_microseconds</span>
<span class="kn">from</span> <span class="nn">google.cloud._helpers</span> <span class="k">import</span> <span class="n">_to_bytes</span>
<div class="viewcode-block" id="Cell"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.Cell">[docs]</a><span class="k">class</span> <span class="nc">Cell</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""Representation of a Google Cloud Bigtable Cell.</span>
<span class="sd"> :type value: bytes</span>
<span class="sd"> :param value: The value stored in the cell.</span>
<span class="sd"> :type timestamp: :class:`datetime.datetime`</span>
<span class="sd"> :param timestamp: The timestamp when the cell was stored.</span>
<span class="sd"> :type labels: list</span>
<span class="sd"> :param labels: (Optional) List of strings. Labels applied to the cell.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">,</span> <span class="n">timestamp</span><span class="p">,</span> <span class="n">labels</span><span class="o">=</span><span class="p">()):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">value</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timestamp</span> <span class="o">=</span> <span class="n">timestamp</span>
<span class="bp">self</span><span class="o">.</span><span class="n">labels</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">labels</span><span class="p">)</span>
<div class="viewcode-block" id="Cell.from_pb"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.Cell.from_pb">[docs]</a> <span class="nd">@classmethod</span>
<span class="k">def</span> <span class="nf">from_pb</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">cell_pb</span><span class="p">):</span>
<span class="sd">"""Create a new cell from a Cell protobuf.</span>
<span class="sd"> :type cell_pb: :class:`._generated.data_pb2.Cell`</span>
<span class="sd"> :param cell_pb: The protobuf to convert.</span>
<span class="sd"> :rtype: :class:`Cell`</span>
<span class="sd"> :returns: The cell corresponding to the protobuf.</span>
<span class="sd"> """</span>
<span class="n">timestamp</span> <span class="o">=</span> <span class="n">_datetime_from_microseconds</span><span class="p">(</span><span class="n">cell_pb</span><span class="o">.</span><span class="n">timestamp_micros</span><span class="p">)</span>
<span class="k">if</span> <span class="n">cell_pb</span><span class="o">.</span><span class="n">labels</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">cls</span><span class="p">(</span><span class="n">cell_pb</span><span class="o">.</span><span class="n">value</span><span class="p">,</span> <span class="n">timestamp</span><span class="p">,</span> <span class="n">labels</span><span class="o">=</span><span class="n">cell_pb</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">cls</span><span class="p">(</span><span class="n">cell_pb</span><span class="o">.</span><span class="n">value</span><span class="p">,</span> <span class="n">timestamp</span><span class="p">)</span></div>
<span class="k">def</span> <span class="nf">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">NotImplemented</span>
<span class="k">return</span> <span class="p">(</span><span class="n">other</span><span class="o">.</span><span class="n">value</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="ow">and</span>
<span class="n">other</span><span class="o">.</span><span class="n">timestamp</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">timestamp</span> <span class="ow">and</span>
<span class="n">other</span><span class="o">.</span><span class="n">labels</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">__ne__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span> <span class="o">==</span> <span class="n">other</span></div>
<div class="viewcode-block" id="PartialCellData"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialCellData">[docs]</a><span class="k">class</span> <span class="nc">PartialCellData</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""Representation of partial cell in a Google Cloud Bigtable Table.</span>
<span class="sd"> These are expected to be updated directly from a</span>
<span class="sd"> :class:`._generated.bigtable_service_messages_pb2.ReadRowsResponse`</span>
<span class="sd"> :type row_key: bytes</span>
<span class="sd"> :param row_key: The key for the row holding the (partial) cell.</span>
<span class="sd"> :type family_name: str</span>
<span class="sd"> :param family_name: The family name of the (partial) cell.</span>
<span class="sd"> :type qualifier: bytes</span>
<span class="sd"> :param qualifier: The column qualifier of the (partial) cell.</span>
<span class="sd"> :type timestamp_micros: int</span>
<span class="sd"> :param timestamp_micros: The timestamp (in microsecods) of the</span>
<span class="sd"> (partial) cell.</span>
<span class="sd"> :type labels: list of str</span>
<span class="sd"> :param labels: labels assigned to the (partial) cell</span>
<span class="sd"> :type value: bytes</span>
<span class="sd"> :param value: The (accumulated) value of the (partial) cell.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">row_key</span><span class="p">,</span> <span class="n">family_name</span><span class="p">,</span> <span class="n">qualifier</span><span class="p">,</span> <span class="n">timestamp_micros</span><span class="p">,</span>
<span class="n">labels</span><span class="o">=</span><span class="p">(),</span> <span class="n">value</span><span class="o">=</span><span class="sa">b</span><span class="s1">''</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">row_key</span> <span class="o">=</span> <span class="n">row_key</span>
<span class="bp">self</span><span class="o">.</span><span class="n">family_name</span> <span class="o">=</span> <span class="n">family_name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">qualifier</span> <span class="o">=</span> <span class="n">qualifier</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timestamp_micros</span> <span class="o">=</span> <span class="n">timestamp_micros</span>
<span class="bp">self</span><span class="o">.</span><span class="n">labels</span> <span class="o">=</span> <span class="n">labels</span>
<span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">value</span>
<div class="viewcode-block" id="PartialCellData.append_value"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialCellData.append_value">[docs]</a> <span class="k">def</span> <span class="nf">append_value</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="sd">"""Append bytes from a new chunk to value.</span>
<span class="sd"> :type value: bytes</span>
<span class="sd"> :param value: bytes to append</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">+=</span> <span class="n">value</span></div></div>
<div class="viewcode-block" id="PartialRowData"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowData">[docs]</a><span class="k">class</span> <span class="nc">PartialRowData</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""Representation of partial row in a Google Cloud Bigtable Table.</span>
<span class="sd"> These are expected to be updated directly from a</span>
<span class="sd"> :class:`._generated.bigtable_service_messages_pb2.ReadRowsResponse`</span>
<span class="sd"> :type row_key: bytes</span>
<span class="sd"> :param row_key: The key for the row holding the (partial) data.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">row_key</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_row_key</span> <span class="o">=</span> <span class="n">row_key</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cells</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">def</span> <span class="nf">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">NotImplemented</span>
<span class="k">return</span> <span class="p">(</span><span class="n">other</span><span class="o">.</span><span class="n">_row_key</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row_key</span> <span class="ow">and</span>
<span class="n">other</span><span class="o">.</span><span class="n">_cells</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">__ne__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span> <span class="o">==</span> <span class="n">other</span>
<div class="viewcode-block" id="PartialRowData.to_dict"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowData.to_dict">[docs]</a> <span class="k">def</span> <span class="nf">to_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Convert the cells to a dictionary.</span>
<span class="sd"> This is intended to be used with HappyBase, so the column family and</span>
<span class="sd"> column qualiers are combined (with ``:``).</span>
<span class="sd"> :rtype: dict</span>
<span class="sd"> :returns: Dictionary containing all the data in the cells of this row.</span>
<span class="sd"> """</span>
<span class="n">result</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">column_family_id</span><span class="p">,</span> <span class="n">columns</span> <span class="ow">in</span> <span class="n">six</span><span class="o">.</span><span class="n">iteritems</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">):</span>
<span class="k">for</span> <span class="n">column_qual</span><span class="p">,</span> <span class="n">cells</span> <span class="ow">in</span> <span class="n">six</span><span class="o">.</span><span class="n">iteritems</span><span class="p">(</span><span class="n">columns</span><span class="p">):</span>
<span class="n">key</span> <span class="o">=</span> <span class="p">(</span><span class="n">_to_bytes</span><span class="p">(</span><span class="n">column_family_id</span><span class="p">)</span> <span class="o">+</span> <span class="sa">b</span><span class="s1">':'</span> <span class="o">+</span>
<span class="n">_to_bytes</span><span class="p">(</span><span class="n">column_qual</span><span class="p">))</span>
<span class="n">result</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">cells</span>
<span class="k">return</span> <span class="n">result</span></div>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">cells</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Property returning all the cells accumulated on this partial row.</span>
<span class="sd"> :rtype: dict</span>
<span class="sd"> :returns: Dictionary of the :class:`Cell` objects accumulated. This</span>
<span class="sd"> dictionary has two-levels of keys (first for column families</span>
<span class="sd"> and second for column names/qualifiers within a family). For</span>
<span class="sd"> a given column, a list of :class:`Cell` objects is stored.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">copy</span><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">)</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">row_key</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Getter for the current (partial) row's key.</span>
<span class="sd"> :rtype: bytes</span>
<span class="sd"> :returns: The current (partial) row's key.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row_key</span></div>
<div class="viewcode-block" id="InvalidReadRowsResponse"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.InvalidReadRowsResponse">[docs]</a><span class="k">class</span> <span class="nc">InvalidReadRowsResponse</span><span class="p">(</span><span class="ne">RuntimeError</span><span class="p">):</span>
<span class="sd">"""Exception raised to to invalid response data from back-end."""</span></div>
<div class="viewcode-block" id="InvalidChunk"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.InvalidChunk">[docs]</a><span class="k">class</span> <span class="nc">InvalidChunk</span><span class="p">(</span><span class="ne">RuntimeError</span><span class="p">):</span>
<span class="sd">"""Exception raised to to invalid chunk data from back-end."""</span></div>
<div class="viewcode-block" id="PartialRowsData"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowsData">[docs]</a><span class="k">class</span> <span class="nc">PartialRowsData</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""Convenience wrapper for consuming a ``ReadRows`` streaming response.</span>
<span class="sd"> :type response_iterator: :class:`~google.cloud.exceptions.GrpcRendezvous`</span>
<span class="sd"> :param response_iterator: A streaming iterator returned from a</span>
<span class="sd"> ``ReadRows`` request.</span>
<span class="sd"> """</span>
<span class="n">START</span> <span class="o">=</span> <span class="s2">"Start"</span> <span class="c1"># No responses yet processed.</span>
<span class="n">NEW_ROW</span> <span class="o">=</span> <span class="s2">"New row"</span> <span class="c1"># No cells yet complete for row</span>
<span class="n">ROW_IN_PROGRESS</span> <span class="o">=</span> <span class="s2">"Row in progress"</span> <span class="c1"># Some cells complete for row</span>
<span class="n">CELL_IN_PROGRESS</span> <span class="o">=</span> <span class="s2">"Cell in progress"</span> <span class="c1"># Incomplete cell for row</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">response_iterator</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_response_iterator</span> <span class="o">=</span> <span class="n">response_iterator</span>
<span class="c1"># Fully-processed rows, keyed by `row_key`</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_rows</span> <span class="o">=</span> <span class="p">{}</span>
<span class="c1"># Counter for responses pulled from iterator</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_counter</span> <span class="o">=</span> <span class="mi">0</span>
<span class="c1"># Maybe cached from previous response</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_last_scanned_row_key</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># In-progress row, unset until first response, after commit/reset</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_row</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Last complete row, unset until first commit</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_previous_row</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># In-progress cell, unset until first response, after completion</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Last complete cell, unset until first completion, after new row</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">NotImplemented</span>
<span class="k">return</span> <span class="n">other</span><span class="o">.</span><span class="n">_response_iterator</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_response_iterator</span>
<span class="k">def</span> <span class="nf">__ne__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span> <span class="o">==</span> <span class="n">other</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">state</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""State machine state.</span>
<span class="sd"> :rtype: str</span>
<span class="sd"> :returns: name of state corresponding to currrent row / chunk</span>
<span class="sd"> processing.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_last_scanned_row_key</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">START</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span> <span class="ow">is</span> <span class="kc">None</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="ow">is</span> <span class="kc">None</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">NEW_ROW</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">CELL_IN_PROGRESS</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">ROW_IN_PROGRESS</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">NEW_ROW</span> <span class="c1"># row added, no chunk yet processed</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">rows</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Property returning all rows accumulated from the stream.</span>
<span class="sd"> :rtype: dict</span>
<span class="sd"> :returns: row_key -> :class:`PartialRowData`.</span>
<span class="sd"> """</span>
<span class="c1"># NOTE: To avoid duplicating large objects, this is just the</span>
<span class="c1"># mutable private data.</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_rows</span>
<div class="viewcode-block" id="PartialRowsData.cancel"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowsData.cancel">[docs]</a> <span class="k">def</span> <span class="nf">cancel</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Cancels the iterator, closing the stream."""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_response_iterator</span><span class="o">.</span><span class="n">cancel</span><span class="p">()</span></div>
<div class="viewcode-block" id="PartialRowsData.consume_next"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowsData.consume_next">[docs]</a> <span class="k">def</span> <span class="nf">consume_next</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Consume the next ``ReadRowsResponse`` from the stream.</span>
<span class="sd"> Parse the response and its chunks into a new/existing row in</span>
<span class="sd"> :attr:`_rows`. Rows are returned in order by row key.</span>
<span class="sd"> """</span>
<span class="n">response</span> <span class="o">=</span> <span class="n">six</span><span class="o">.</span><span class="n">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_response_iterator</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_counter</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_last_scanned_row_key</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> <span class="c1"># first response</span>
<span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">last_scanned_row_key</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">InvalidReadRowsResponse</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_last_scanned_row_key</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">last_scanned_row_key</span>
<span class="n">row</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span>
<span class="n">cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span>
<span class="k">for</span> <span class="n">chunk</span> <span class="ow">in</span> <span class="n">response</span><span class="o">.</span><span class="n">chunks</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="k">if</span> <span class="n">chunk</span><span class="o">.</span><span class="n">reset_row</span><span class="p">:</span>
<span class="n">row</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">row</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">row</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span> <span class="o">=</span> <span class="n">PartialRowData</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span><span class="p">)</span>
<span class="k">if</span> <span class="n">cell</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span> <span class="o">=</span> <span class="n">PartialCellData</span><span class="p">(</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span><span class="p">,</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">family_name</span><span class="o">.</span><span class="n">value</span><span class="p">,</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">qualifier</span><span class="o">.</span><span class="n">value</span><span class="p">,</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">timestamp_micros</span><span class="p">,</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">labels</span><span class="p">,</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_copy_from_previous</span><span class="p">(</span><span class="n">cell</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">cell</span><span class="o">.</span><span class="n">append_value</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
<span class="k">if</span> <span class="n">chunk</span><span class="o">.</span><span class="n">commit_row</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_save_current_row</span><span class="p">()</span>
<span class="n">row</span> <span class="o">=</span> <span class="n">cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">chunk</span><span class="o">.</span><span class="n">value_size</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_save_current_cell</span><span class="p">()</span>
<span class="n">cell</span> <span class="o">=</span> <span class="kc">None</span></div>
<div class="viewcode-block" id="PartialRowsData.consume_all"><a class="viewcode-back" href="../../../../bigtable/row-data.html#google.cloud.bigtable.row_data.PartialRowsData.consume_all">[docs]</a> <span class="k">def</span> <span class="nf">consume_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">max_loops</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Consume the streamed responses until there are no more.</span>
<span class="sd"> This simply calls :meth:`consume_next` until there are no</span>
<span class="sd"> more to consume.</span>
<span class="sd"> :type max_loops: int</span>
<span class="sd"> :param max_loops: (Optional) Maximum number of times to try to consume</span>
<span class="sd"> an additional ``ReadRowsResponse``. You can use this</span>
<span class="sd"> to avoid long wait times.</span>
<span class="sd"> """</span>
<span class="n">curr_loop</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">max_loops</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">max_loops</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="s1">'inf'</span><span class="p">)</span>
<span class="k">while</span> <span class="n">curr_loop</span> <span class="o"><</span> <span class="n">max_loops</span><span class="p">:</span>
<span class="n">curr_loop</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">consume_next</span><span class="p">()</span>
<span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span>
<span class="k">break</span></div>
<span class="nd">@staticmethod</span>
<span class="k">def</span> <span class="nf">_validate_chunk_status</span><span class="p">(</span><span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`_validate_chunk_row_in_progress`, etc."""</span>
<span class="c1"># No reseet with other keys</span>
<span class="k">if</span> <span class="n">chunk</span><span class="o">.</span><span class="n">reset_row</span><span class="p">:</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'family_name'</span><span class="p">))</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'qualifier'</span><span class="p">))</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">timestamp_micros</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">value_size</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
<span class="c1"># No commit with value size</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">commit_row</span> <span class="ow">and</span> <span class="n">chunk</span><span class="o">.</span><span class="n">value_size</span> <span class="o">></span> <span class="mi">0</span><span class="p">)</span>
<span class="c1"># No negative value_size (inferred as a general constraint).</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">value_size</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_validate_chunk_new_row</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`_validate_chunk`."""</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">NEW_ROW</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">reset_row</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">family_name</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">qualifier</span><span class="p">)</span>
<span class="c1"># This constraint is not enforced in the Go example.</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">value_size</span> <span class="o">></span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">chunk</span><span class="o">.</span><span class="n">commit_row</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">False</span><span class="p">)</span>
<span class="c1"># This constraint is from the Go example, not the spec.</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_previous_row</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span> <span class="o"><=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_row</span><span class="o">.</span><span class="n">row_key</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_same_as_previous</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`_validate_chunk_row_in_progress`"""</span>
<span class="n">previous</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span>
<span class="k">return</span> <span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span> <span class="o">==</span> <span class="n">previous</span><span class="o">.</span><span class="n">row_key</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">family_name</span> <span class="o">==</span> <span class="n">previous</span><span class="o">.</span><span class="n">family_name</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">qualifier</span> <span class="o">==</span> <span class="n">previous</span><span class="o">.</span><span class="n">qualifier</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">labels</span> <span class="o">==</span> <span class="n">previous</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_validate_chunk_row_in_progress</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`_validate_chunk`"""</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">ROW_IN_PROGRESS</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk_status</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span><span class="o">.</span><span class="n">row_key</span><span class="p">)</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'family_name'</span><span class="p">)</span> <span class="ow">and</span>
<span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'qualifier'</span><span class="p">))</span>
<span class="n">previous</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span>
<span class="n">_raise_if</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_same_as_previous</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span> <span class="ow">and</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">timestamp_micros</span> <span class="o"><=</span> <span class="n">previous</span><span class="o">.</span><span class="n">timestamp_micros</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_validate_chunk_cell_in_progress</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`_validate_chunk`"""</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">CELL_IN_PROGRESS</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk_status</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_copy_from_current</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_validate_chunk</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`consume_next`."""</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">NEW_ROW</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk_new_row</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">ROW_IN_PROGRESS</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk_row_in_progress</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">state</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">CELL_IN_PROGRESS</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_validate_chunk_cell_in_progress</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_save_current_cell</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`consume_next`."""</span>
<span class="n">row</span><span class="p">,</span> <span class="n">cell</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span>
<span class="n">family</span> <span class="o">=</span> <span class="n">row</span><span class="o">.</span><span class="n">_cells</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">cell</span><span class="o">.</span><span class="n">family_name</span><span class="p">,</span> <span class="p">{})</span>
<span class="n">qualified</span> <span class="o">=</span> <span class="n">family</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">cell</span><span class="o">.</span><span class="n">qualifier</span><span class="p">,</span> <span class="p">[])</span>
<span class="n">complete</span> <span class="o">=</span> <span class="n">Cell</span><span class="o">.</span><span class="n">from_pb</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cell</span><span class="p">)</span>
<span class="n">qualified</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">complete</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cell</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="n">cell</span>
<span class="k">def</span> <span class="nf">_copy_from_current</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chunk</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`consume_next`."""</span>
<span class="n">current</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span>
<span class="k">if</span> <span class="n">current</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span><span class="p">:</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">row_key</span> <span class="o">=</span> <span class="n">current</span><span class="o">.</span><span class="n">row_key</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'family_name'</span><span class="p">):</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">family_name</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">current</span><span class="o">.</span><span class="n">family_name</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">HasField</span><span class="p">(</span><span class="s1">'qualifier'</span><span class="p">):</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">qualifier</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">current</span><span class="o">.</span><span class="n">qualifier</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">timestamp_micros</span><span class="p">:</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">timestamp_micros</span> <span class="o">=</span> <span class="n">current</span><span class="o">.</span><span class="n">timestamp_micros</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">chunk</span><span class="o">.</span><span class="n">labels</span><span class="p">:</span>
<span class="n">chunk</span><span class="o">.</span><span class="n">labels</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">current</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_copy_from_previous</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cell</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`consume_next`."""</span>
<span class="n">previous</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span>
<span class="k">if</span> <span class="n">previous</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">cell</span><span class="o">.</span><span class="n">row_key</span><span class="p">:</span>
<span class="n">cell</span><span class="o">.</span><span class="n">row_key</span> <span class="o">=</span> <span class="n">previous</span><span class="o">.</span><span class="n">row_key</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">cell</span><span class="o">.</span><span class="n">family_name</span><span class="p">:</span>
<span class="n">cell</span><span class="o">.</span><span class="n">family_name</span> <span class="o">=</span> <span class="n">previous</span><span class="o">.</span><span class="n">family_name</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">cell</span><span class="o">.</span><span class="n">qualifier</span><span class="p">:</span>
<span class="n">cell</span><span class="o">.</span><span class="n">qualifier</span> <span class="o">=</span> <span class="n">previous</span><span class="o">.</span><span class="n">qualifier</span>
<span class="k">def</span> <span class="nf">_save_current_row</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Helper for :meth:`consume_next`."""</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cell</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_save_current_cell</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_rows</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_row</span><span class="o">.</span><span class="n">row_key</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_row</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_previous_row</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_row</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_previous_cell</span> <span class="o">=</span> <span class="kc">None</span></div>
<span class="k">def</span> <span class="nf">_raise_if</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="sd">"""Helper for validation methods."""</span>
<span class="k">if</span> <span class="n">predicate</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">InvalidChunk</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
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