commonprefix

Deprecated since 3.15. Deprecated in favor of os.path.commonpath() for path prefixes. The os.path.commonprefix() function is being deprecated due to having a misleading name and module. The function is not safe to use for path prefixes despite being included in a module about path manipulation, meaning it is easy to accidentally introduce path traversal vulnerabilities into Python programs by using this function.

Given a list of pathnames, returns the longest common leading component

>>> os.path.commonprefix(['/usr/lib', '/usr/local/lib'])
'/usr/l'

>>> os.path.commonpath(['/usr/lib', '/usr/local/lib'])
'/usr'