[Tutor] String and integer
jens.frid at gmail.com
Tue Oct 21 09:01:17 CEST 2008
Thank you all!Very informative and much appreciated!
On Tue, Oct 21, 2008 at 1:33 AM, wesley chun <wescpy at gmail.com> wrote:
> >> def nr():
> >> nr1 = input('Enter value: ')
> >> print str(nr1).strip('nr0')
> >> The user input is always on the form "nr08756" and i'd like to take out
> >> the "nr0" and then print the result.
> >> I can see that there is a problem with a variable looking like "pn0123"
> >> because i get: NameError: global name 'nr0123' is not defined.
> >> What is the right way to do this?
> > raw_input() rather than input(). input evaluate whatever is entered;
> > raw_input returns as a string whatever is entered.
> > In Python 3 raw_input will be renamed input and the old input will go
> everything that bob said... and more. :-)
> definitely never ever use input()... it is absolutely unnecessary and
> a potential security hazard, hence the reason why its functionality
> will be completely removed in 3.0. for now, as bob has suggested, use
> raw_input() in the remaining 2.x releases then switch to input() for
> with regards to the rest of your query, if you are certain that the
> first few chars of the input is 'nr0', you can just so nr1[3:] to get
> the rest. if you want to play it safe, throw in a "if
> nr1.startswith('nr0')" beforehand.
> finally, be careful with strip(). you are not stripping just the "nr0"
> with strip('nr0')... you are removing all 'n's, 'r's, and '0's from
> your string, i.e.
> >>> 'nr07890'.strip('nr0')
> this is the reason why i suggested nr1[3:] instead... it chops off the
> 1st 3 chars and takes the remainer.
> hope this helps!
> -- wesley
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> "Core Python Programming", Prentice Hall, (c)2007,2001
> wesley.j.chun :: wescpy-at-gmail.com
> python training and technical consulting
> cyberweb.consulting : silicon valley, ca
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