code: def read(self, filenames):
          
          if isinstance(filenames, basestring):
              filenames = [filenames]
          read_ok = []
          for filename in filenames:
              try:
                  fp = open(filename)
              except IOError:
                  continue
              self._read(fp, filename)
              fp.close()
              read_ok.append(filename)
          return read_ok
docs: Read and parse a filename or a list of filenames.
  
          Files that cannot be opened are silently ignored; this is
          designed so that you can specify a list of potential
          configuration file locations (e.g. current directory, user's
          home directory, systemwide directory), and all existing
          configuration files in the list will be read.  A single
          filename may also be given.
  
          Return list of successfully read files.