```python
def test1(a):
a = a + 100
print("1-函数内部a=: %d"%a) ##300
b = 200
print("2-调用函数之前: b = %d"%b)##200
test1(b)
print("3-调用函数之后: b = %d"%b)##200
print("*"*50)
def test1(a):
a.append("300")
print("1-函数内部a=: %s"%a) ## 100 ,200,300
b = [100,200]
print("2-调用函数之前: b = %s"%b)##100,200
test1(b)
print("3-调用函数之后: b = %s"%b)#100,200,300