watcher.py 文件源码

def log_lines():
    current_file = inspect.getframeinfo(sys._getframe(1)).filename
    pprint('Tracing is ON in %r' % current_file)

    def tracer(frame, event, arg):
        if event != 'line':
            return tracer

        info = inspect.getframeinfo(frame)
        code = info.code_context[0] if info.code_context else ''
        if info.filename == current_file:
            pprint('Executing %s:%s %s' % (info.filename, info.lineno, code))

        return tracer

    old_trace = sys.gettrace()

    def restore():
        sys.settrace(old_trace)

    sys.settrace(tracer)

    return restore