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python34
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lib64
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python3.4
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"""Filename globbing utility.""" import os import re import fnmatch __all__ = ["glob", "iglob"] def glob(pathname): """Return a list of paths matching a pathname pattern. The pattern may contain simple shell-style wildcards a la fnmatch. However, unlike fnmatch, filenames starting with a dot are special cases that are not matched by '*' and '?' patterns. """ return list(iglob(pathname)) def iglob(pathname): """Return an iterator which yields the paths matching a pathname pattern. The pattern may contain simple shell-style wildcards a la fnmatch. However, unlike fnmatch, filenames starting with a dot are special cases that are not matched by '*' and '?' patterns. """ dirname, basename = os.path.split(pathname) if not has_magic(pathname): if basename: if os.path.lexists(pathname): yield pathname else: # Patterns ending with a slash should match only directories if os.path.isdir(dirname): yield pathname return if not dirname: yield from glob1(None, basename) return # `os.path.split()` returns the argument itself as a dirname if it is a # drive or UNC path. Prevent an infinite recursion if a drive or UNC path # contains magic characters (i.e. r'\\?\C:'). if dirname != pathname and has_magic(dirname): dirs = iglob(dirname) else: dirs = [dirname] if has_magic(basename): glob_in_dir = glob1 else: glob_in_dir = glob0 for dirname in dirs: for name in glob_in_dir(dirname, basename): yield os.path.join(dirname, name) # These 2 helper functions non-recursively glob inside a literal directory. # They return a list of basenames. `glob1` accepts a pattern while `glob0` # takes a literal basename (so it only has to check for its existence). def glob1(dirname, pattern): if not dirname: if isinstance(pattern, bytes): dirname = bytes(os.curdir, 'ASCII') else: dirname = os.curdir try: names = os.listdir(dirname) except OSError: return [] if not _ishidden(pattern): names = [x for x in names if not _ishidden(x)] return fnmatch.filter(names, pattern) def glob0(dirname, basename): if not basename: # `os.path.split()` returns an empty basename for paths ending with a # directory separator. 'q*x/' should match only directories. if os.path.isdir(dirname): return [basename] else: if os.path.lexists(os.path.join(dirname, basename)): return [basename] return [] magic_check = re.compile('([*?[])') magic_check_bytes = re.compile(b'([*?[])') def has_magic(s): if isinstance(s, bytes): match = magic_check_bytes.search(s) else: match = magic_check.search(s) return match is not None def _ishidden(path): return path[0] in ('.', b'.'[0]) def escape(pathname): """Escape all special characters. """ # Escaping is done by wrapping any of "*?[" between square brackets. # Metacharacters do not work in the drive part and shouldn't be escaped. drive, pathname = os.path.splitdrive(pathname) if isinstance(pathname, bytes): pathname = magic_check_bytes.sub(br'[\1]', pathname) else: pathname = magic_check.sub(r'[\1]', pathname) return drive + pathname
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