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normpath.py solution in Clear category for Simplify Unix Path by U.V
def _fspath(path):
"""Return the path representation of a path-like object.
If str or bytes is passed in, it is returned unchanged. Otherwise the
os.PathLike interface is used to get the path representation. If the
path representation is not str or bytes, TypeError is raised. If the
provided path is not str, bytes, or os.PathLike, TypeError is raised.
"""
if isinstance(path, (str, bytes)):
return path
# Work from the object's type to match method resolution of other magic
# methods.
path_type = type(path)
try:
path_repr = path_type.__fspath__(path)
except AttributeError:
if hasattr(path_type, '__fspath__'):
raise
else:
raise TypeError("expected str, bytes or os.PathLike object, "
"not " + path_type.__name__)
if isinstance(path_repr, (str, bytes)):
return path_repr
else:
raise TypeError("expected {}.__fspath__() to return str or bytes, "
"not {}".format(path_type.__name__,
type(path_repr).__name__))
def normpath(path):
"""Normalize path, eliminating double slashes, etc."""
path = _fspath(path)
if isinstance(path, bytes):
sep = b'/'
empty = b''
dot = b'.'
dotdot = b'..'
else:
sep = '/'
empty = ''
dot = '.'
dotdot = '..'
if path == empty:
return dot
initial_slashes = path.startswith(sep)
# POSIX allows one or two initial slashes, but treats three or more
# as single slash.
# (see http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13)
if (initial_slashes and
path.startswith(sep*2) and not path.startswith(sep*3)):
initial_slashes = 2
comps = path.split(sep)
new_comps = []
for comp in comps:
if comp in (empty, dot):
continue
if (comp != dotdot or (not initial_slashes and not new_comps) or
(new_comps and new_comps[-1] == dotdot)):
new_comps.append(comp)
elif new_comps:
new_comps.pop()
comps = new_comps
path = sep.join(comps)
if initial_slashes:
path = sep*initial_slashes + path
return path or dot
def simplify_path(p):
ans = normpath(p).replace('\\',r'/').replace('//', '/').replace('/./', '/')
print(ans)
return ans
Sept. 21, 2022
