pyobj.py 文件源码

def line_number(self):
        """Get the current line number the frame is executing."""
        # We don't keep f_lineno up to date, so calculate it based on the
        # instruction address and the line number table.
        lnotab = self.f_code.co_lnotab
        byte_increments = six.iterbytes(lnotab[0::2])
        line_increments = six.iterbytes(lnotab[1::2])

        byte_num = 0
        line_num = self.f_code.co_firstlineno

        for byte_incr, line_incr in zip(byte_increments, line_increments):
            byte_num += byte_incr
            if byte_num > self.f_lasti:
                break
            line_num += line_incr

        return line_num