TypeError: unorderable types: str() > int()

#! /usr/bin/env python# -*- coding: utf-8 -*-def absolute(x):if x>0:return xelse:return -xprint('Please enter a num:')num = input()print(absolute(num))运行以上代码，报错信息如下：Tr

zheng-bin

6438人浏览 · 2017-03-11 20:44:11

zheng-bin · 2017-03-11 20:44:11 发布

#! /usr/bin/env python
# -*- coding: utf-8 -*-

def absolute(x):
    if x>0:
        return x
    else:
        return -x

print('Please enter a num:')
num = input()
print(absolute(num))

运行以上代码，报错信息如下：

Traceback (most recent call last):
File “5_func.py”, line 12, in
print(absolute(num))
File “5_func.py”, line 5, in absolute
if x>0:
TypeError: unorderable types: str() > int()
报错原因:
python3里面input默认接收到的是str类型，返回str类型
解决:
将input返回值进行强制转换，如下

num = int(input())