正则表达式 Python：负前瞻删除/保留开头的数字

Question

目的是将基数和序数保留在字符串的开头，只要它们紧接在单词PERFORMANCE或之前SCORE：

#These numbers are kept:

100 SCORE FOR STUDENT

80 PERFORMANCE FOR TEACHER

但是，如果数字在开头并且以下单词不同，则应将其删除：

#These numbers are removed

10095TH 10097TH 179TH SCHOOL ANIVERSARY

11 12 10 SECONDARY LEVELS

100 100 100 100 SCHOOL AGREEMENT

我遇到的问题是在单词之前PERFORMANCE或SCORE有空格分隔的数字时：

#All numbers should be kept

3 10 100 PERFORMANCE

001 10 12345 SCORE

我正在应用以下正则表达式，但最后一部分很混乱(?!\s*\d*\s*\d*\s*(?:PERFORMANCE|SCORE)\b)，因为目前这只是考虑之前PERFORMANCE或SCORE要保留的 3 组数字：

(?<=[A-Za-z]\b )([ 0-9]*(ST|[RN]D|TH)?\b)|^(([\d ]+(ST|[RN]D|TH)?)*\b)(?!\s*\d*\s*\d*\s*(?:PERFORMANCE|SCORE)\b)

以前的正则表达式适用于以下情况：

3 10 100 PERFORMANCE

001 10 12345 SCORE

但如果我添加一组额外的数字，它将不起作用：

3 10 100 1 PERFORMANCE

001 10 1 12345 SCORE

如何推广此规则以包含所有数字集？

Answer 1

尝试以下操作：^(?:\d+(?:ST|[RN]D|TH)?\s)+(?=[^\d]+$)(?!PERFORMANCE|SCORE)^&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;anchor to beginning(?:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;start non-capturing group&nbsp; &nbsp; \d+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;match one or more digits&nbsp; &nbsp; (?:ST|[RN]D|TH)?&nbsp; &nbsp; optionally followed by one of your approved suffixes&nbsp; &nbsp; \s&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; then a whitespace)+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; one or more times(?=[^\d]+$&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; assert that the rest of the line is number-free (forces the regex to not backtrack to the last number)(?!PERFORMANCE|SCORE)&nbsp; &nbsp;assert that the following characters are NOT 'PERFORMANCE' or 'SCORE'&nbsp;