python如何设定返回值？_CDA答疑社区

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詹惠儿

2019-02-13 阅读量: 777

python如何设定返回值？

函数返回值可以为空，也可以设定特定返回值：

def hello_decorator(func):

def inner1(*args, **kwargs):

print("before Execution")

# getting the returned value

returned_value = func(*args, **kwargs)

print("after Execution")

# returning the value to the original frame

return returned_value

return inner1

# adding decorator to the function

@hello_decorator

def sum_two_numbers(a, b):

print("Inside the function")

return a + b

a, b = 1, 2

# getting the value through return of the function

print("Sum =", sum_two_numbers(a, b))

输出：

before Execution
Inside the function
after Execution
Sum = 3

0.0000

0

2

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