#闭包学习
def my_sum(*arg):
print ('in my_sum')
return sum(arg)
def my_average(*arg):
return sum(arg)/len(arg)
def dec(func):
def in_dec(*arg):
print ('in dec arg=', arg);
if len(arg) == 0:
return o
for val in arg:
if not sinstance(val, int):
return 0
return func(*arg)
