global和nonlocal

def scope_test(): def do_local(): spam = "局部变量" # 1 # spam = "nonlocal 变量" def do_nonlocal(): nonlocal spam # 使用外层的spam变量 spam = "nonlocal 变量" # 2 def do_global(): global spam spam = "global 变量" # 3 spam = "test spam" # 4 do_local() print("本地分配后:", spam) # 4 do_nonlocal() print("nonlocal分配后:", spam) # 2 do_global() print("global分配后:", spam) # 2 scope_test() print("全局范围:", spam) # 3 #结果4223