Issue #7575: An overflow test for math.expm1 was failing on OS X 10.4/Intel,
[python.git] / Lib / glob.py
blob04364be7dfb7898def3c7464bef57e59d2d023dd
1 """Filename globbing utility."""
3 import sys
4 import os
5 import re
6 import fnmatch
8 __all__ = ["glob", "iglob"]
10 def glob(pathname):
11 """Return a list of paths matching a pathname pattern.
13 The pattern may contain simple shell-style wildcards a la fnmatch.
15 """
16 return list(iglob(pathname))
18 def iglob(pathname):
19 """Return an iterator which yields the paths matching a pathname pattern.
21 The pattern may contain simple shell-style wildcards a la fnmatch.
23 """
24 if not has_magic(pathname):
25 if os.path.lexists(pathname):
26 yield pathname
27 return
28 dirname, basename = os.path.split(pathname)
29 if not dirname:
30 for name in glob1(os.curdir, basename):
31 yield name
32 return
33 if has_magic(dirname):
34 dirs = iglob(dirname)
35 else:
36 dirs = [dirname]
37 if has_magic(basename):
38 glob_in_dir = glob1
39 else:
40 glob_in_dir = glob0
41 for dirname in dirs:
42 for name in glob_in_dir(dirname, basename):
43 yield os.path.join(dirname, name)
45 # These 2 helper functions non-recursively glob inside a literal directory.
46 # They return a list of basenames. `glob1` accepts a pattern while `glob0`
47 # takes a literal basename (so it only has to check for its existence).
49 def glob1(dirname, pattern):
50 if not dirname:
51 dirname = os.curdir
52 if isinstance(pattern, unicode) and not isinstance(dirname, unicode):
53 dirname = unicode(dirname, sys.getfilesystemencoding() or
54 sys.getdefaultencoding())
55 try:
56 names = os.listdir(dirname)
57 except os.error:
58 return []
59 if pattern[0] != '.':
60 names = filter(lambda x: x[0] != '.', names)
61 return fnmatch.filter(names, pattern)
63 def glob0(dirname, basename):
64 if basename == '':
65 # `os.path.split()` returns an empty basename for paths ending with a
66 # directory separator. 'q*x/' should match only directories.
67 if os.path.isdir(dirname):
68 return [basename]
69 else:
70 if os.path.lexists(os.path.join(dirname, basename)):
71 return [basename]
72 return []
75 magic_check = re.compile('[*?[]')
77 def has_magic(s):
78 return magic_check.search(s) is not None