def __init__(self, file, extraLines):
        """
        @type file: file-like object
        @param file: A file containing a mail message.

        @type extraLines: L{int}
        @param extraLines: The number of lines of the message body to retrieve.
        """
        self._file = file
        self._extraLines = extraLines
        self.linecount = 0
        self.headers = 1
        self.done = 0
        self.buf = b''

        @type file: file-like object
        @param file: A file containing a mail message.

        @type extraLines: L{int}
        @param extraLines: The number of lines of the message body to retrieve.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/pop3.py