g_var = 0                    #A
nl_var = 0                  #A
print("top level-> g_var: {0} nl_var: {1}".format(g_var, nl_var))
def test():
    nl_var = 2              #B
    print("in test-> g_var: {0} nl_var: {1}".format(g_var, nl_var))
    def inner_test():
        global g_var                             #C
        nonlocal nl_var                           #D
        g_var = 1
        nl_var = 4
        print("in inner_test-> g_var: {0} nl_var: {1}".format(g_var,
                                                              nl_var))
        
    inner_test()
    print("in test-> g_var: {0} nl_var: {1}".format(g_var, nl_var))

test()
print("top level-> g_var: {0} nl_var: {1}".format(g_var, nl_var))