[英]Best way to split a string in python with multiple separators - while keeping the separators
假設我有字符串:
string = "this is a test string <LW> I want to <NL>split this string<NL> by each tag I have inserted.<AB>"
我想通過我在前一個函數中插入字符串的每個自定義標記拆分字符串:
tags = ["<LW>", "<NL>", "<AB>"]
這是所需的輸出:
splitString = splitByTags(string, tags)
for s in splitString:
print(s)
產量
"this is a test string <LW>"
" I want to <NL>"
"split this string<NL>"
" by each tag I have inserted.<AB>"
所以基本上我想用多個子串分割字符串,同時將這些子串保持在分割中。 這樣做最快捷,最有效的方法是什么? 我知道我可以使用string.split並簡單地將拆分文本附加到每一行但是我不確定如何使用多個字符串執行此操作。
使用re.split
捕獲括號。
例如:
import re
string = "this is a test string <LW> I want to <NL>split this string<NL> by each tag I have inserted.<AB>"
tags = ["<LW>", "<NL>", "<AB>"]
splt_str = re.split("(" + "|".join(tags) + ")", string)
for i in range(0, len(splt_str), 2):
print("".join(splt_str[i:i+2]))
輸出:
this is a test string <LW>
I want to <NL>
split this string<NL>
by each tag I have inserted.<AB>
這里有一些例子如何做到這一點:
import re
def split_string(string, tags):
string_list = []
start = 0
for tag in tags:
tag_index = re.finditer(tag, string)
for item in tag_index:
end_tag = item.start() + len(tag)
string_list.append(string[start:end_tag])
start = end_tag
return string_list
data = split_string(string, tags)
輸出:
['this is a test string <LW>', ' I want to <NL>', 'split this string<NL>', ' by each tag I have inserted.<AB>']
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