Source Code for Module qm.test.classes.python_label

 1  ######################################################################## 
 2  # 
 3  # File:   python_label.py 
 4  # Author: Mark Mitchell 
 5  # Date:   06/11/2002 
 6  # 
 7  # Contents: 
 8  #   PythonLabel 
 9  # 
10  # Copyright (c) 2002 by CodeSourcery, LLC.  All rights reserved.  
11  # 
12  ######################################################################## 
13   
14  ######################################################################## 
15  # Imports 
16  ######################################################################## 
17   
18  from   qm.label   import * 
19  import re 
20   
21  ######################################################################## 
22  # Classes 
23  ######################################################################## 
24   
25 -class PythonLabel(Label): 
26      """A 'PythonLabel' is a 'Label' that uses the 'a.b.c' naming scheme. 
27   
28      A 'PythonLabel' is a 'Label' whose separator character is the period 
29      and whose components consist of lower-case letters, numerals, and 
30      underscores.  These labels have the property that they can be easily 
31      mapped to filenames on most operating systems; all valid labels are 
32      valid filenames (replacing '.' with '/') and two different labels 
33      will always map to two different filenames.""" 
34   
35      _sep = '.' 
36      """The separator character used to separate components.""" 
37   
38      __valid_label_regexp = re.compile("[-a-z0-9_%s]+$" % _sep) 
39      """A compiled regular expression that matches valid labels.""" 
40       
41 -    def IsValid(self, label, is_component): 
42          """Returns true if this label is not valid. 
43   
44          returns -- True if this label is not valid.""" 
45   
46          if not Label.IsValid(self, label, is_component): 
47              # If the label does not meet the basic validity 
48              # requirements, reject it. 
49              return 0 
50          elif not self.__valid_label_regexp.match(label): 
51              # If the label contains invalid characters, reject it. 
52              return 0 
53   
54          return 1 
55