正则分组匹配词边界问题：无法提取赛事名称，求修正方案

Your original regex is failing for a few key reasons, and we can adjust it to correctly extract the home team, away team, and competition (EuroLeague) from the thread title. Let's break down the fixes and solution:

Why the Original Regex Failed #

1. Missing spaces around the hyphen: The title uses Barcelona - Olimpia Milano (with spaces around the hyphen), but your regex uses -(.*?) which looks for a hyphen without surrounding spaces—so it couldn't find the team separator.
2. Missing closing bracket: The regex ends with \b instead of matching the closing ] at the end of the competition section, so it couldn't fully match the title structure.
3. Unanchored match: Without start (^) and end ($) anchors, the regex might fail to match if there's any unexpected content, even if most parts align.
4. Overly broad competition capture: Your original competition group tried to capture everything inside the brackets, but you only need the first word (EuroLeague), and the non-greedy match without a clear end point led to no valid capture.

Corrected Regex #

Here's the adjusted regex that addresses all these issues:

title_group_regex = r"^Post-Match Thread: (?P<home_team>.*?) - (?P<away_team>.*?) \[(?P<competition>\w+).*?\]$"

Regex Breakdown #

• ^Post-Match Thread:: Anchors the match to the start of the string, ensuring we only process valid post-match threads.
• (?P<home_team>.*?): Non-greedily captures the home team name until it hits the - separator.
• -: Explicitly matches the space-hyphen-space separator between home and away teams.
• (?P<away_team>.*?): Non-greedily captures the away team name until it hits the [ (space + opening bracket) leading to the competition details.
• \[(?P<competition>\w+).*?\]$: Captures the first word inside the brackets (your desired EuroLeague) using \w+, then ignores the rest of the text inside the brackets until the closing ] and end of the string.

Usage Example #

Here's how to implement this correctly, including strip() to handle any accidental leading/trailing whitespace:

import re

thread_title = "Post-Match Thread: Barcelona - Olimpia Milano [EuroLeague Regular Season, Round 24]"
title_group_regex = r"^Post-Match Thread: (?P<home_team>.*?) - (?P<away_team>.*?) \[(?P<competition>\w+).*?\]$"

match = re.search(title_group_regex, thread_title)
if match:
    home_team = match.group('home_team').strip()
    away_team = match.group('away_team').strip()
    competition = match.group('competition').strip()
    
    print(f"Home Team: {home_team}")
    print(f"Away Team: {away_team}")
    print(f"Competition: {competition}")
else:
    print("No match found—check the title format.")

Output #

Home Team: Barcelona
Away Team: Olimpia Milano
Competition: EuroLeague

This will avoid the NoneType error because the regex now fully matches the title structure, and correctly extracts all three pieces of data you need.

内容的提问来源于stack exchange，提问作者Joao Pereira