Question

我需要帮助只用较长的字符串替换整个单词，考虑它们在字符串中的位置，同时替换的单词也在列表中，所以我们遍历所有这些单词并替换所有单词。 I have tried using this solution但它没有用，我还没有找到解决这个问题的解决办法。

我的代码是：

import re

string1="box unbox boxing boxer box box"
string2="ban banana unban ban ban"
string3="box unbox boxing boxer box box ban banana unban ban ban"

dictionary={"box" , "ban"}

var = "chair"

pat = re.compile(r'\b' + '|'.join(dictionary) + r'\b')

string1 = pat.sub(var, string1)
string2 = pat.sub(var, string2)
string3 = pat.sub(var, string3)

print(string1)
print(string2)
print(string3)

我想要的是“盒子”和“禁止”字样被“椅子”取代，无论它们位于字符串的末尾或开头，或者不管它周围有多少个空格。它应该只替换“盒子”和“禁止”字样。

目前的输出是：

chair unbox chairing chairer chair chair
chair banana unchair chair chair
chair unbox chairing chairer chair chair chair banana unchair chair chair

我希望输出为：

chair unbox boxing boxer chair chair
chair banana unban chair chair
chair unbox boxing boxer chair chair chair banana unban chair chair

Answer 1

这可能是你想要的：

import re

strings = ["box unbox boxing boxer box box", "ban banana unban ban ban", "box unbox boxing boxer box box ban banana unban ban ban"]

lst = ["box" , "ban"]

rx = re.compile(r'\b(?:{})\b'.format("|".join(lst)))

strings = [rx.sub('chair', string) for string in strings]
print(strings)

这会产生

['chair unbox boxing boxer chair chair', 'chair banana unban chair chair', 'chair unbox boxing boxer chair chair chair banana unban chair chair']

Answer 2

您的问题是您的正则表达式构造为

\bbox|ban\b

应该在哪里

\b(box|ban)\b

将相关行更改为

pat = re.compile(r'\b(' + '|'.join(dictionary) + r')\b')

替换python3中的字符串中的整个单词

2 个答案: