iter()
IterableReturns an iterator object. Can also create a callable iterator with a sentinel value.
Signature
iter(object, sentinel)
Returns
iteratorExample
nums = [1, 2, 3] it = iter(nums) print(next(it)) # 1 print(next(it)) # 2
About iter()
iter is a Python iterable function with the signature iter(object, sentinel). Returns an iterator object. Can also create a callable iterator with a sentinel value. It returns a value of type iterator.
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 iterfunction is commonly used in data processing, web development, scripting, and automation tasks.
When working with iter(), 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.