在以下代码中,无论执行a.py还是b.py,都会报错。 # a.py from b import y def x(): print('x') # b.py from a import x def y(): print('y') #在a.py中运行,产生的报错内容如下 Traceback (most recent call last): File "D:\python\a.py", line 1, in <module> from b import y File "D:\python\b.py", line ...