Problem with string parsing
Michael J. Fromberger
Michael.J.Fromberger at Clothing.Dartmouth.EDU
Wed Oct 6 16:19:51 EDT 2004
In article <CuWdnb3aJ90b0v7cRVn-hg at powergate.ca>,
Peter L Hansen <peter at engcorp.com> wrote:
> wes weston wrote:
> > Mike,
> > Note that after the appropriate if:
> >
> > >>> '1_mature_dt=10-May-2002'[len('1_mature_dt='):]
> > '10-May-2002'
>
> Though I would guess that the following is closer to
> what was actually thought by the OP to be the behaviour of
> .lstrip():
>
> def lstripsub(s, sub):
> if s.startswith(sub):
> return s[len(sub):]
> else:
> return s
>
> >>> s = '1_mature_dt=10-May-2002'
> >>> lstripsub(s, '1_mature_dt=')
> '10-May-2002'
Or, perhaps:
def lstripsub(s, sub):
while s.startswith(sub):
s = s[len(sub):]
return s
You could argue it should strip ALL leading occurrences of the leader,
to be consistent with the behaviour of str.lstrip().
But that, I realize, is being somewhat pedantic, and I do not dispute
that your solution is quite reasonable. :)
-M
--
Michael J. Fromberger | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/ | Dartmouth College, Hanover, NH, USA
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