Issue #388 - Fix python driver build from source (#389)

* Fixed a bug where python driver throws error when build from source

* Moved required packages to requirements.txt

* Update Readme

Rearranged instructions and added instructions to install from requirements.txt

* Fixed a typo in exceptions.py file

Fixed a typo 'SqlExcution' on line 62 in exceptions.py file

Author: Hunaid2000

drivers/python/README.md

@@ -11,9 +11,15 @@ AGType parser and driver support for [Apache AGE](https://age.apache.org/), grap
 ```
 sudo apt-get update
 sudo apt-get install python3-dev libpq-dev
-pip install --no-binary :all: psycopg2
-pip install antlr4-python3-runtime==4.9.2
+git clone https://github.com/apache/age.git
+cd age/drivers/python
+```
+
+### Install required packages
+```
+pip install -r requirements.txt
 ```
+
 ### Test
 ```
 python -m unittest -v test_age_py.py
@@ -22,18 +28,13 @@ python -m unittest -v test_agtypes.py
 
 ### Build from source
 ```
-git clone https://github.com/apache/age.git
-cd age/drivers/python
-
 python setup.py install
-
 ```
 
 ### Install from PyPi
 
 ```
 pip install apache-age-python
-
 ```
 
 ### For more information about [Apache AGE](https://age.apache.org/)

drivers/python/requirements.txt

@@ -29,12 +29,10 @@
     author_email     = 'rhizome.ai@gmail.com',
     url              = 'https://github.com/apache/age',
     license          = 'Apache2.0',
-    install_requires = [ 'psycopg2', 'antlr4-python3-runtime' ],
+    install_requires = [ 'psycopg2', 'antlr4-python3-runtime==4.9.3'],
     packages         = ['age', 'age.gen'],
     keywords         = ['Graph Database', 'Apache AGE', 'PostgreSQL'],
     python_requires  = '>=3.9',
-    # package_data     =  {},
-    # zip_safe=False,
     classifiers      = [
         'Programming Language :: Python :: 3.9'
     ]