Python -匹配最后一个单词并从前一行中删除

import re

def delete_last_word(text):
    lines = text.split('\n')
    last_line = lines[-1]
    match = re.search(r'\b\w+\b$', last_line)
    if match:
        last_word = match.group()
        previous_line = lines[-2]
        lines[-2] = re.sub(r'\b{}\b'.format(last_word), '', previous_line)
    return '\n'.join(lines)

text = """
This is the first line.
This is the second line.
This is the last line with the word to be deleted.
"""

result = delete_last_word(text)
print(result)