itertools.chain()
ItertoolsChains multiple iterables together into a single continuous iterable.
Signature
itertools.chain(*iterables)
Returns
chainExample
from itertools import chain a = [1, 2, 3] b = [4, 5, 6] result = list(chain(a, b)) print(result) # [1, 2, 3, 4, 5, 6]
About itertools.chain()
itertools.chain is a Python itertools function with the signature itertools.chain(*iterables). Chains multiple iterables together into a single continuous iterable. It returns a value of type chain.
Python provides a rich set of built-in functions and standard library modules that cover common programming tasks. Understanding these functions helps you write more idiomatic, efficient Python code. The itertools.chainfunction is commonly used in data processing, web development, scripting, and automation tasks.
When working with itertools.chain(), consider edge cases like empty inputs, None values, and type mismatches. Python's duck typing means many built-in functions work with any object that implements the required protocol (e.g., __len__ for len(), __iter__ for iteration). This flexibility is a key strength of Python's design philosophy.