We have this in re.sub(). Not sure we need a second way to do it. On Sun, Jul 19, 2020 at 12:57 PM artem6191 wrote:

Example: '1 1 1 1'.replace('1', lambda char, index: str(index)+char) # '01 11 21 31' _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/7WBQW3... Code of Conduct: http://python.org/psf/codeofconduct/

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