我们从Python开源项目中，提取了以下14个代码示例，用于说明如何使用os.PathLike()。
def commonprefix(m): "Given a list of pathnames, returns the longest common leading component" if not m: return '' # Some people pass in a list of pathname parts to operate in an OS-agnostic # fashion; don't try to translate in that case as that's an abuse of the # API and they are already doing what they need to be OS-agnostic and so # they most likely won't be using an os.PathLike object in the sublists. if not isinstance(m[0], (list, tuple)): m = tuple(map(os.fspath, m)) s1 = min(m) s2 = max(m) for i, c in enumerate(s1): if c != s2[i]: return s1[:i] return s1 # Are two stat buffers (obtained from stat, fstat or lstat) # describing the same file?
def _fscodec(): encoding = sys.getfilesystemencoding() errors = sys.getfilesystemencodeerrors() def fsencode(filename): """Encode filename (an os.PathLike, bytes, or str) to the filesystem encoding with 'surrogateescape' error handler, return bytes unchanged. On Windows, use 'strict' error handler if the file system encoding is 'mbcs' (which is the default encoding). """ filename = fspath(filename) # Does type-checking of `filename`. if isinstance(filename, str): return filename.encode(encoding, errors) else: return filename def fsdecode(filename): """Decode filename (an os.PathLike, bytes, or str) from the filesystem encoding with 'surrogateescape' error handler, return str unchanged. On Windows, use 'strict' error handler if the file system encoding is 'mbcs' (which is the default encoding). """ filename = fspath(filename) # Does type-checking of `filename`. if isinstance(filename, bytes): return filename.decode(encoding, errors) else: return filename return fsencode, fsdecode
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__)) # If there is no C implementation, make the pure Python version the # implementation as transparently as possible.
def _parse_args(cls, args): # This is useful when you don't want to create an instance, just # canonicalize some constructor arguments. parts = [] for a in args: if isinstance(a, PurePath): parts += a._parts else: if sys.version_info >= (3, 6): a = os.fspath(a) else: # duck typing for older Python versions if hasattr(a, "__fspath__"): a = a.__fspath__() if isinstance(a, str): # Force-cast str subclasses to str (issue #21127) parts.append(str(a)) # also handle unicode for PY2 (six.text_type = unicode) elif six.PY2 and isinstance(a, six.text_type): # cast to str using filesystem encoding parts.append(a.encode(sys.getfilesystemencoding())) else: raise TypeError( "argument should be a str object or an os.PathLike " "object returning str, not %r" % type(a)) return cls._flavour.parse_parts(parts)
def match(self, path_pattern): """ Return True if this path matches the given pattern. """ cf = self._flavour.casefold path_pattern = cf(path_pattern) drv, root, pat_parts = self._flavour.parse_parts((path_pattern,)) if not pat_parts: raise ValueError("empty pattern") if drv and drv != cf(self._drv): return False if root and root != cf(self._root): return False parts = self._cparts if drv or root: if len(pat_parts) != len(parts): return False pat_parts = pat_parts[1:] elif len(pat_parts) > len(parts): return False for part, pat in zip(reversed(parts), reversed(pat_parts)): if not fnmatch.fnmatchcase(part, pat): return False return True # Can't subclass os.PathLike from PurePath and keep the constructor # optimizations in PurePath._parse_args().
def fspath(path): """ Return the string representation of the path. If str or bytes is passed in, it is returned unchanged. This code comes from PEP 519, modified to support earlier versions of python. This is required for python < 3.6. """ if isinstance(path, (py.builtin.text, py.builtin.bytes)): return path # Work from the object's type to match method resolution of other magic # methods. path_type = type(path) try: return path_type.__fspath__(path) except AttributeError: if hasattr(path_type, '__fspath__'): raise try: import pathlib except ImportError: pass else: if isinstance(path, pathlib.PurePath): return py.builtin.text(path) raise TypeError("expected str, bytes or os.PathLike object, not " + path_type.__name__)
