code: def parse_changes():
      
  
      with open('CHANGES') as changes:
          for match in re.finditer(RE_CHANGES, changes.read(1024), re.M):
              if len(match.group(1)) != len(match.group(3)):
                  error('incorrect underline in CHANGES')
  
              date = datetime.datetime.strptime(match.group(4),
                                                '%Y-%m-%d').date()
  
              if date != datetime.date.today():
                  error('release date is not today')
  
              return match.group(2)
  
      error('invalid release entry in CHANGES')
docs: grab version from CHANGES and validate entry