python - 在 python re 中分隔字符串中的第一个单词

Question

我需要将字符串分成两组；第一个词和第二个词或词组。单词由下划线分隔，当我使用当前代码时，如果有多个下划线，它只会分隔最后一个。这是我目前拥有的代码:

for record in reader:
s = record['trial']
patternsubgen = re.compile(r'(\w+)\(\w+\)\_(\w+)')
source = "Footit"
if patternsubgen.search(s):
    resultsubgen = patternsubgen.search(s)
    genussubgen = resultsubgen.group(1)
    speciessubgen = resultsubgen.group(2)
    subgen = '%s %s' % (genussubgen, speciessubgen)
    #print(subgen)
else:
    pattern = re.compile(r'(\w+)\_(\w+)')
    if pattern.search(s):
        result = pattern.search(s)
        genus = result.group(1)
        species = result.group(2)
        new = '%s %s' % (genus, species)
        print(new)

以下是字符串的一些示例:

Aphis(Aphis)_asclepiadis, Cinara_011, Clydesmithia_canadensis_1a,

我需要的是:

Aphis asclepiadis,
Cinara 011,
Clydesmithia canadensis_1a,

我得到的是:

Aphis asclepiadis,
Cinara 011,
Clydesmithia_canadensis 1a

Answer 1

对于给定的字符串，你可以使用

\b([^_\W]+)(?:\([^()]+\))?_(\w+)\b

参见 a demo on regex101.com .

---

在 Python 中:

import re

strings = 'Aphis(Aphis)_asclepiadis, Cinara_011, Clydesmithia_canadensis_1a,'

rx = re.compile(r'\b([^_\W]+)(?:\([^()]+\))?_(\w+)\b')

strings = rx.sub("\g<1> \g<2>", strings)
print(strings)
# Aphis asclepiadis, Cinara 011, Clydesmithia canadensis_1a,