python - 正则表达式，带有可选部分 IN 变量

Question

我在 python 中这样做，我有几个这样的变量。

team = "St. John's"
db_team = "St. John's"  
db_team = "St John's" 
#I am not sure which variable db_team will equal

re.search(team, db_team) 

但显然这不起作用，因为 team 变量中的 period ，但同时我不能从 team 变量中取出所有时期。不确定如何获取团队变量并匹配任一 db_team 变量？

Answer 1

用来re.escape逃避你的点和所有其他阴暗的东西。

re.search(re.escape(team), db_team)

Answer 2

team = "St\\.? John's"

\\is 是为了逃避 the .，而is?是让它成为可选的。

Answer 3

import re
team = "St. John's"
db_team1 = "St. John's"
db_team2 = "St John's"

# find an exact match for 'St' without a dot, replace it with 'St.' 

db_team1 = re.sub(r'\bc\b', 'St.', db_team1)
db_team2 = re.sub(r'\bSt(?!\.)\b', 'St.', db_team2)
team = re.sub(r'\bSt(?!\.)\b', 'St.', team)

# then compare strings without regex

if team == db_team1: print "match1"
if team == db_team2: print "match2"

使用标准表示的相同方法可以扩展到包括其他缩写。从这个意义上说，您可以考虑首先将 db 和 user 中的所有字符串转换为小写。