def _search_start(self):
        while 1:
            pos = self.fp.tell()
            line = self.fp.readline()
            if not line:
                raise EOFError
            if line[:5] == 'From ' or self._isrealfromline(line):
                self.fp.seek(pos)
                return
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/UnixMailbox._search_start/operator `and` -> `or`