[英]Remove every second comma from string (python)
I would like to remove every second occurence of a comma in my string but starting from the second comma.我想删除字符串中每隔一个逗号出现的地方,但从第二个逗号开始。 My string: "30, 20, 40, 50" and I would like my result to be: "30 20, 40 50" So far I have been using regular expressions to try and achieve this by the following reg sub:
myString = re.sub('(,[^,])*,', r'\1', myString)
but this results in: "30, 20 40, 50".我的字符串:“30, 20, 40, 50”,我希望我的结果是:“30 20, 40 50” 到目前为止,我一直在使用正则表达式来尝试通过以下 reg sub 实现这一点:
myString = re.sub('(,[^,])*,', r'\1', myString)
但这会导致:“30, 20 40, 50”。 I hope someone can help me out here.我希望有人可以在这里帮助我。
You can group the non-comma characters and the optional following comma for preservation instead:您可以将非逗号字符和可选的以下逗号分组以进行保存:
myString = re.sub(',([^,]*,?)', r'\1', myString)
Demo: https://replit.com/@blhsing/EminentWholeOctagons演示: https://replit.com/@blhsing/EminentWholeOctagons
Thanks to those that responded.感谢那些做出回应的人。 My own solution meanwhile ended up being:
myString = re.sub(',([^,]*[,]*)', r'\1', myString)
同时我自己的解决方案最终是:
myString = re.sub(',([^,]*[,]*)', r'\1', myString)
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