What is PEP 8?

PEP 8 is the official style guide for Python code. PEP stands for Python Enhancement Proposal. It was first written in 2001 and gives simple rules so that everyone writes Python in a similar, readable way.

• Use 4 spaces for each indentation level, not tabs.
• Keep lines up to 79 characters.
• Use snake_case for variables and functions, and CapWords for class names.
• Put spaces around operators and after commas.
• Leave two blank lines between top-level functions and classes.

# Not PEP 8 style
def AddNumbers(a,b):
  return a+b
x=AddNumbers(2,3)

# PEP 8 style
def add_numbers(a, b):
    return a + b


total = add_numbers(2, 3)

Both versions work, but the second one is easier to read. Tools like flake8 and black can check or fix the style automatically.

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