code: def getrawheader(self, name):
          
  
          lst = self.getfirstmatchingheader(name)
          if not lst:
              return None
          lst[0] = lst[0][len(name) + 1:]
          return ''.join(lst)
docs: A higher-level interface to getfirstmatchingheader().
  
          Return a string containing the literal text of the header but with the
          keyword stripped.  All leading, trailing and embedded whitespace is
          kept in the string, however.  Return None if the header does not
          occur.