Reference library

Functions & basics

Small reusable building blocks — parameters, returns, and clear function design.

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Functions & basics easy

Function with default argument

Define a reusable greet helper with an optional prefix parameter.

functions defaults basics

Python

def greet(name, prefix="Hello"):
    return f"{prefix}, {name}!"


print(greet("Python"))
print(greet("World", prefix="Hi"))

3 0 Open

Functions & basics medium

Return multiple values

Return a tuple of results and unpack them at the call site.

functions return tuple

Python

def min_max(values):
    if not values:
        return None, None
    return min(values), max(values)


data = [3, 9, 1, 7]
lo, hi = min_max(data)
print(f"range: {lo} .. {hi}")

4 0 Open

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Each section groups closely related Python snippets.

Strings & text 3 Lists & loops 3 Functions & basics 2 Files & data 2 Errors & debugging 2