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

#! /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))

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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())