ospath

Ospath, commonly referred to as os.path, is a Python standard library module that provides a collection of utilities for manipulating filesystem paths. It offers a cross-platform interface for path operations by delegating to platform-specific implementations: posixpath on POSIX systems and ntpath on Windows. This design allows code to manipulate paths in a way that respects the conventions of the underlying operating system.

The module includes functions for constructing, decomposing, and normalizing paths, as well as querying filesystem properties. Key capabilities cover joining components (join), parsing paths into components (split, dirname, basename), splitting the drive or root (splitdrive), and handling file extensions (splitext). It also provides normalization and case handling utilities (normpath, normcase), as well as obtaining absolute paths (abspath) and canonical paths (realpath).

For querying and testing paths, os.path exposes existence and type checks (exists, isabs, isfile, isdir, islink, ismount) and information retrieval (getsize, getmtime, getatime, getctime). It also offers utilities to compare paths (samefile) and to derive relative or common paths (relpath, commonprefix, commonpath). Additional helpers include expanduser and expandvars, which resolve user tilde shortcuts and environment variables, respectively.

Platform differences are a core aspect: path separators, drive letters, and certain conventions follow the host operating system. As a result, behavior can vary between POSIX and Windows semantics. Since Python 3.4, pathlib has provided an object-oriented alternative for path manipulation, but os.path remains widely used for compatibility and lightweight scripting.

See also: pathlib, os module.