ymal_tut.yml

# 1. Yaml data is stored using key-value pairs. 
key: value

# 2. There are two ways to store a list of items in yaml.
  # i). Using a dash followed by a space for each item in the list.
fruits:
  - apple
  - banana
  - orange

  # ii). Using square brackets and separating items with commas.
vegetables: [carrot, broccoli, spinach]

# 3. Define a object with multiple attributes using key-value pairs.
person:
  name: John Doe
  age: 30
  city: New York

# 4. Object can also be stored in a list
people:
  - name: John Doe
    age: 30
    city: New York

  - name: Jane Smith
    age: 25
    city: Los Angeles
    friends:
      - name: Mike Johnson
        age: 28
        city: Chicago
      - name: Emily Davis
        age: 27
        city: Miami


# 5. A very common program config example with ymal
Pipeline:
  # Attribute pipeline name
  name: "Training Pipeline"
  # Steps is a list of objects, each object has a name, type and parameters
  steps:
    - name: "Load Data"
      type: data_loader
      parameters: [
        {"path": "data/input.csv"},
        {"format": "csv"}
      ]
    - name: "Clean Data"
      type: data_cleaner
      parameters: [
        {"method": "remove_nulls"},
        {"threshold": 0.5}
      ]
    - name: "Train Model"
      type: model_trainer 
      parameters: [
        {"algorithm": "random_forest"},
        {"n_estimators": 100},
        {"max_depth": 10}
      ]
  # Last list attribute
  args: [
    {"batch_size": 32},
    {"learning_rate": 0.001},
    {"num_epochs": 10}
  ]

# 6. String representations
# . Single-line string
greeting: "Hello, World!"
# 6.2. Multi-line string using pipe (|) for preserving line breaks
description: |
  This is a multi-line string.
  It preserves line breaks and formatting.
  You can write paragraphs of text here.

# 6.3. Multi-line string using greater-than (>) for folding newlines