nonlocal:声明该变量不是当前函数的本地变量 global:在函数内部声明变量为全局变量
x=300 def mytest1(): x =200 def mytest2(): #global x nonlocal x print(x) x=100 print(x) return mytest2 t1 = mytest1() t1() #结果为： #200 #100 x=300 def mytest1(): x =200 def mytest2(): global x # nonlocal x print(x) x=100 print(x) return mytest2 t1 = mytest1() t1() #结果为： #300 #100