我想这样做。你知道什么好方法吗？
import re
if __name__ == '__main__':
sample = "eventA 12:30 - 14:00 5200yen / eventB 15:30 - 17:00 10200yen enjoy!"
i_want_to_generate = "eventA 12:30 - 14:00 5,200yen / eventB 15:30 - 17:00 10,200yen enjoy!"
replaced = re.sub("(\d{1,3})(\d{3})", "$1,$2", sample) # Wrong.
print(replaced) # eventA 12:30 - 14:00 $1,$2yen / eventB 15:30 - 17:00 $1,$2yen enjoy!
请您参考如下方法:
您没有为反向引用使用正确的符号。您还可以添加包含货币的正面前瞻断言，以确保仅更改 'yen' 之后的货币:
replaced = re.sub(r"(\d{1,3})(\d{3})(?=yen)", r"\1,\2", sample) # Wrong.
print(replaced)
# eventA 12:30 - 14:00 5,200yen / eventB 15:30 - 17:00 10,200yen enjoy!
