Thank you all!Very informative and much appreciated! Regards, Jens
On Tue, Oct 21, 2008 at 1:33 AM, wesley chun <[EMAIL PROTECTED]> 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 > away. > > > 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 > 3.x. > > 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') > '789' > > 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 > http://corepython.com > > wesley.j.chun :: wescpy-at-gmail.com > python training and technical consulting > cyberweb.consulting : silicon valley, ca > http://cyberwebconsulting.com >
_______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor