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Functions & basics

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

4 matches

Build a Progress Callback Function for Loops in Python

Create a reusable progress callback that receives per-step data and lets callers log or update a UI as a loop runs.

def run_with_progress(items, desc="Processing", step_callback=None):
    """Run a loop with progress updates via callback."""
    total = len(items)
    for idx, item in enumerate(items):
        # Process the item (simulated work here)
        result = item * 2

        # Build progress data dictionary
        if ste…

14 0 Open

Functions & basics medium

How to Parse Function Signatures in Python with inspect

Extract a function's parameter names, kinds, defaults, annotations, and return type using Python's built-in inspect module.

inspect function signature introspection

Python

import inspect

def example_function(a: int, b: str = "default", *args, c: float = 1.5, **kwargs) -> bool:
    """An example function with various parameter types."""
    return True

def parse_signature(func):
    """Parse a function's signature using the inspect module."""
    sig = inspect.signature(func)
    param…

14 0 Open

Functions & basics easy

How to Pipe Data Through a List of Transform Functions in Python

Applies a sequence of functions to an initial value using functools.reduce, creating a reusable pipe utility.

functions functional reduce

Python

from functools import reduce

def pipe(data, *transforms):
    return reduce(lambda value, func: func(value), transforms, data)

def double(x):
    return x * 2

def add_one(x):
    return x + 1

def to_string(x):
    return f"Result: {x}"

if __name__ == "__main__":
    initial = 5
    result = pipe(initial, double, …

13 0 Open

Functions & basics easy

How to Write a Python Decorator with functools.wraps

Create a decorator that wraps a function while preserving its metadata using functools.wraps.

decorator functools wraps

Python

from functools import wraps


def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Calling {func.__name__}")
        return func(*args, **kwargs)
    return wrapper


@logger
def greet(name):
    """Return a friendly greeting."""
    return f"Hello, {name}!"


if __name__ == "__main__":…

12 0 Open

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