Method _check_read

Lib/gzip.py:340–344

(self, caller)

        return length

    def _check_read(self, caller):
        if self.mode != READ:
            import errno
            msg = f"{caller}() on write-only GzipFile object"
            raise OSError(errno.EBADF, msg)

    def read(self, size=-1):
        self._check_not_closed()