I have some use cases with:
cut_at = some_str.find(sep)
head, tail = some_str[:cut_at], some_str[cut_at:]
and:
cut_at = some_str.find(sep)
head, tail = some_str[:cut_at], some_str[cut_at+offset:] # offset !=
len(sep)
So if partition() [or whatever it'll be called] could have an optional
second argument that defines the width of the 'cut' made, I would be
helped enormously. The default for this second argument would be
len(sep), to preserve the current proposal.
--eric
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