open()
open() is a Python function in the Built-in Functions category. Opens a file and returns a file object. The syntax is open(file, mode="r", buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None). Parameters: file — path or file descriptor. Returns: File object. A typical example: with open("file.txt", "r") as f:
content = f.read(). A close sibling is print(), which prints objects to the text stream, separated by `sep` and followed by `end`. A close sibling is len(), which returns the length (number of items) of an object. Works with sequences, collections, and strings. A close sibling is range(), which returns an immutable sequence of numbers. Commonly used in for loops. A close sibling is type(), which returns the type of an object, or creates a new type with three arguments. More about this category: Python's built-in functions available without importing — print, len, range, map, and more. For a broader walkthrough, read the Built-in Functions guide.