如何从python中的列表中删除所有整数值 [英] How to remove all integer values from a list in python

问题描述

我只是 Python 的初学者，我想知道是否可以从列表中删除所有整数值?例如文档如下

I am just a beginner in python and I want to know is it possible to remove all the integer values from a list? For example the document goes like

['1','introduction','to','molecular','8','the','learning','module','5']

删除后我希望文档看起来像:

After the removal I want the document to look like:

['introduction','to','molecular','the','learning','module']

推荐答案

要删除所有整数，请执行以下操作:

To remove all integers, do this:

no_integers = [x for x in mylist if not isinstance(x, int)]

但是，您的示例列表实际上并不包含整数.它仅包含字符串，其中一些仅由数字组成.要过滤掉它们，请执行以下操作:

However, your example list does not actually contain integers. It contains only strings, some of which are composed only of digits. To filter those out, do the following:

no_integers = [x for x in mylist if not (x.isdigit() 
                                         or x[0] == '-' and x[1:].isdigit())]

或者:

is_integer = lambda s: s.isdigit() or (s[0] == '-' and s[1:].isdigit())
no_integers = filter(is_integer, mylist)

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