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Functions & basics

Reusable building blocks — parameters, returns, scope, and clear function design.

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Functions & basics easy

How to measure function memory with sys.getsizeof in Python

Measure the memory footprint of Python functions (user-defined and built-in) using sys.getsizeof.

sys getsizeof memory
Python
import sys

def sample_function(a, b, c):
    return a + b - c

def measure_function_memory(func):
    size = sys.getsizeof(func)
    print(f"Memory size of {func.__name__}: {size} bytes")

if __name__ == "__main__":
    measure_function_memory(sample_function)
    measure_function_memory(print)
    measure_function_m…
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Functions & basics — Python code examples

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This page collects functions & basics snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

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Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.