Too much builtins (was Re: Python's simplicity philosophy
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Wed Nov 19 07:31:24 CET 2003
"Andrew Dalke" <adalke at mindspring.com> wrote in message news:HdDub.5445$sb4.4376 at newsread2.news.pas.earthlink.net...
| Georgy Pruss:
| > BTW is there some Python's equivalents to C's strspn, strcspn, strpbrk,
| > which return a leading sub-string, entirely [not] consisting of characters
| > of some char.set; and something like strtoul which parses the string and
| > returns the number and the position where the scan ended?
| Not directly. In Python those are most often done with regexps.
| import re
| def strspn(s, t):
| # kinda slow way to construct the pattern, but it does correctly
| # handle the '-' and ']' cases. Usually one would write the regexp
| # directly and not try to get close to the C API.
| pat = re.compile("(" + "|".join(map(re.escape, t) + ")*")
| m = pat.match(s)
| if not m:
| return 0
| return m.end()
Yes, thanks. Especially with regex'es it's just a matter of a minute or two.
I miss those C functions though.
| dalke at dalkescientific.com
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