在Python中遇到“name 'reduce' is not defined”错误,通常是因为reduce函数的使用方式不正确或者未正确导入。下面我将根据几个可能的情况来详细解释和提供解决方案: 1. 确认reduce函数的来源reduce函数在Python中有两种常见的来源: Python 2的内置函数:在Python 2中,reduce是一个内置函数,可以直接使用。 Python 3中...
NameError: name'reduce'isnotdefined 原来自 Python3 之后,这个函数从全局命名空间中移除,放在了functools模块,因为如果想正确执行,必须这样 In [2]:fromfunctoolsimportreduce In [3]: reduce(lambdax, y: x+y, [1,2,3,4,5]) Out[3]:15 参考资料: 1、functools...
reduce函数在python3的内建函数移除了,放入了functools模块 参考: NameError: global name ‘reduce’ is not defined 连接: https://stackoverflow.com/questions/10226381/nameerror-global-name-reduce-is-not-defined
NameError: name 'reduce' is not defined 1. 2. 3. 4. 5. 6. 7. 原来自 Python3 之后,这个函数从全局命名空间中移除,放在了 functools模块,因为如果想正确执行,必须这样 In [2]: from functools import reduce In [3]: reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) Out[...
简介: Python编程:NameError: name 'reduce' is not defined 问题来了 使用reduce() 测试的时候报错:reduce 未定义! print(reduce(lambda x, y: x + y, [ 1, 2, 3])) """Output: NameError: name 'reduce' is not defined """ 解决 引用stackoverflow的回答: - 你使用的是python3 - 参考的是...
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