How Should I Name Variables and Functions in Python?

Python Variable and Function Naming Conventions

Unlike C# where camelCase or PascalCase are prevalent in variable and method naming, Python offers a plethora of possibilities. Variables and functions can be named using camelCase, PascalCase, or snake_case. While it may seem haphazard, Python's naming conventions are guided by the Python Enhancement Proposal (PEP) 8.

PEP 8: Function and Variable Names

According to PEP 8, the following guidelines should be followed:

• Function Names:

  • Use lowercase letters.
  • Separate words with underscores to enhance readability.

• Variable Names:

  • Follow the same convention as function names.

• Exceptions:

  • mixedCase is acceptable in situations where it is the accepted style, such as in the threading.py module.

Example:

Adhering to these principles, the following coding style becomes preferable:

this_is_a_variable = 'a'

def this_is_a_function():
    pass

While you may still encounter other naming styles in Python code, adhering to PEP 8 ensures consistency and readability, promoting collaboration and code maintainability.

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