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Python Source  |  2009-02-17  |  1.6 KB  |  53 lines
  1. import os
  2.  
  3. # Do not get the version list from pyversions, it isn't reliable
  4. py_supported = ['python2.5', 'python2.6']
  5. py_installed = [ ver for ver in py_supported if os.access('/usr/bin/'+ver,os.X_OK) ]
  6. py_supported_short = [ a.replace("python","") for a in py_supported ]
  7. py_oldversions = ['python2.1','python2.2','python2.3', 'python2.4']
  8.  
  9. def version_cmp(ver1,ver2):
  10.   v1=[int(i) for i in ver1.split('.')]
  11.   v2=[int(i) for i in ver2.split('.')]
  12.   return cmp(v1,v2)
  13.  
  14. # Parse the version format from .version files
  15. class version_list:
  16.   def __init__(self,version_info):
  17.     self.verlist=[]
  18.     dummylist=[]
  19.     for item in version_info.rstrip('\n').split(','):
  20.       v=[i.strip() for i in item.split('-')]
  21.       if len(v)>1:
  22.         if v[0]:
  23.           dummylist.append(v[0])
  24.         else:
  25.           v[0] = py_supported_short[0]
  26.           dummylist.append("0")
  27.         if v[1]:
  28.           dummylist.append(v[1])
  29.         else:
  30.           v[1] = py_supported_short[-1]
  31.           dummylist.append("100")
  32.         for ver in py_supported_short:
  33.           try:
  34.             if version_cmp(ver,v[0]) >= 0 and version_cmp(ver,v[1]) <= 0:
  35.           self.verlist.append(ver)
  36.           except ValueError:
  37.             pass
  38.       else:
  39.         dummylist.append(v[0])
  40.         if v[0] in py_supported_short:
  41.           self.verlist.append(v[0])
  42.     self.verlist.sort(version_cmp)
  43.     dummylist.sort(version_cmp)
  44.     self.min=dummylist[0]
  45.     if self.min=="0": self.min=None
  46.     self.max=dummylist[-1]
  47.     if self.max=="100": self.max=None
  48.     self.pylist=['python'+i for i in self.verlist]
  49.   def __iter__(self):
  50.     return iter(self.pylist)
  51.   def __contains__(self,item):
  52.     return item in self.pylist
  53.