Python父目录、子目录的相互调用方法

def showdata():  print("this is a")def plus():  a=1  b=2  print(a+b)

def show():  print("this is b")

from test1.a import showdatafrom test1.a import plusfrom test2.b import showshowdata()show()plus()

import syssys.path.append("..")from test1 import a as tt.showdata()