正則表達式，帶可選部分IN變量

Question

我在python中這樣做，我有一個像這樣的變量。

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) 

，但顯然，這並不因爲球隊變量裏面時期的工作，但在同一時間，我不能隨便拿出從球隊變量的所有時段。不知道如何採取團隊變量和匹配任何db_team變量？

Answer 1

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

的\\是爲了躲避.和?是使其可選。

Answer 2

使用re.escape來逃避你的點和所有其他陰涼的東西。

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

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" 

使用標準表示的方法相同的方法可以擴展到包括其它縮寫。從這個意義上講，你可以考慮先將數據庫和用戶的所有字符串轉換爲小寫字母。