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comparison python/lsex.py @ 865:20aa4a6ef719

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python3
author Jeff Hammel <k0scist@gmail.com>
date Mon, 18 Jun 2018 14:48:41 -0700
parents 77e7cab3e9f2
children
comparison
equal deleted inserted replaced
864:7191914724f0 865:20aa4a6ef719
1 #!/usr/bin/env python 1 #!/usr/bin/env python
2
2 import os 3 import os
3 import sys 4 import sys
4 from optparse import OptionParser 5 from optparse import OptionParser
5 6
6 # make sure duplicate path elements aren't printed twice 7 try:
8 # python 2
9 string = (str, unicode)
10 except NameError:
11 # python 3
12 string = (str,)
13
7 def ordered_set(alist): 14 def ordered_set(alist):
15 """make sure duplicate path elements aren't printed twice"""
16
8 seen = set() 17 seen = set()
9 new = [] 18 new = []
10 for item in alist: 19 for item in alist:
11 if item in seen: 20 if item in seen:
12 continue 21 continue
23 """ 32 """
24 33
25 if path is None: 34 if path is None:
26 # use system path 35 # use system path
27 path = os.environ['PATH'] 36 path = os.environ['PATH']
28 if isinstance(path, basestring): 37 if isinstance(path, string):
29 path = ordered_set(path.split(os.pathsep)) 38 path = ordered_set(path.split(os.pathsep))
30 39
31 executables = [] 40 executables = []
32 41
33 # add the executable files to the list 42 # add the executable files to the list
34 for i in path: 43 for i in path:
35 if not os.path.isdir(i): 44 if not os.path.isdir(i):
36 continue 45 continue
37 files = [ os.path.join(i,j) for j in os.listdir(i) ] 46 files = [ os.path.join(i,j) for j in os.listdir(i) ]
38 files = filter(lambda x: os.access(x, os.X_OK), files) 47 files = list(filter(lambda x: os.access(x, os.X_OK), files))
39 files.sort() # just to make the output pretty 48 files.sort() # just to make the output pretty
40 executables.extend(files) 49 executables.extend(files)
41 return executables 50 return executables
42 51
43 def executable_names(path=None): 52 def executable_names(path=None):
50 parser.add_option('--names', action='store_true', default=False, 59 parser.add_option('--names', action='store_true', default=False,
51 help="list only the set of names") 60 help="list only the set of names")
52 61
53 options, args = parser.parse_args() 62 options, args = parser.parse_args()
54 if options.names: 63 if options.names:
55 for i in sorted(executable_names()): 64 print ('\n'.join(sorted(executable_names())))
56 print i
57 sys.exit(0) 65 sys.exit(0)
58 66
59 for i in lsex(): 67 for i in lsex():
60 print i 68 print (i)