Python Naming Convention > Variable Naming

snake_case

• Should be all in lowercase
• Not begin with the special characters like e.g. & (ampersand), $ (dollar)
• If the name contains multiple words, it should be separated by underscores (_) e.g. json_string
• Avoid one-character variables e.g. a, b

class Student
    age = None
    _id = None
    ...