def add(a, b):
a = a + b
return a
def add_list(a, b):
a = a.append(b)
return a
if __name__ == '__main__':
c = [1, 3]
d = [2, 4]
add(c, d)
print(c)
c = add(c, d)
print(c)
e = 5
add_list(c, e)
print(c)
c = add_list(c, e)
print(c)
运行结果: