如何在某个单词之前提取数字? [英] How to extract a number before a certain words?

问题描述

有一句话我有 5 公斤苹果和 6 公斤梨".

There is a sentence "i have 5 kg apples and 6 kg pears".

我只想提取苹果的重量.

I just want to extract the weight of apples.

所以我用

sentence = "I have 5 kg apples and 6 kg pears"
number = re.findall(r'(\d+) kg apples', sentence)
print (number)

然而，它只适用于整数.那么如果我要提取的数字是5.5怎么办?

However, it just works for integer numbers. So what should I do if the number I want to extract is 5.5?

推荐答案

您需要的正则表达式应如下所示:

The regex you need should look like this:

(\d+.?\d*) kg apples

您可以执行以下操作:

number = re.findall(r'(\d+.?\d*) kg apples', sentence)

这里是一个在线示例

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