Hi, It seems that for every group of 2 or more +-/* signs, one of the following holds:
- The group starts with '-', everything after it should be dropped, otherwise - The second character is '-', everything after it should be dropped, otherwise - Drop everything after the first. That should turn into one short regex. Did I miss something? Remco On Jan 28, 2008 4:10 PM, <[EMAIL PROTECTED]> wrote: > Hi pythoners. > > I am generating strings of length n, randomly from the symbols > > +-/*0123456789 > > What would be the 'sensible' way of transforming the string, for example > changing '3++++++8' into 3+8 > or '3++--*-9' into '3+-9' such that eval(string) will always return a > number? > > in cases where multiple symbols conflict in meaning (as '3++--*-9' the > earliest valid symbols in the sequence should be preserved > > so for example, > > '3++*/-9' = 3+-9 > '45--/**/+7' = 45-+7 > '55/-**+-6**' = 55/-6 > > ...that is, unless there is a canonical method for doing this that does > something else instead.. > > > this sounds like homework. It's not. I like making problems up and it's a > slow work day. So, as an aside, there is no real reason I want to do this, > nor other problem to solve, nor other background to what I'm trying to > achieve ;) other than twiddling with python. > > Matt. > > > > This message and any attachments (the "message") is > intended solely for the addressees and is confidential. > If you receive this message in error, please delete it and > immediately notify the sender. Any use not in accord with > its purpose, any dissemination or disclosure, either whole > or partial, is prohibited except formal approval. The internet > can not guarantee the integrity of this message. > BNP PARIBAS (and its subsidiaries) shall (will) not > therefore be liable for the message if modified. > Do not print this message unless it is necessary, > consider the environment. > > --------------------------------------------- > > Ce message et toutes les pieces jointes (ci-apres le > "message") sont etablis a l'intention exclusive de ses > destinataires et sont confidentiels. Si vous recevez ce > message par erreur, merci de le detruire et d'en avertir > immediatement l'expediteur. Toute utilisation de ce > message non conforme a sa destination, toute diffusion > ou toute publication, totale ou partielle, est interdite, sauf > autorisation expresse. L'internet ne permettant pas > d'assurer l'integrite de ce message, BNP PARIBAS (et ses > filiales) decline(nt) toute responsabilite au titre de ce > message, dans l'hypothese ou il aurait ete modifie. > N'imprimez ce message que si necessaire, > pensez a l'environnement. > -- > http://mail.python.org/mailman/listinfo/python-list >
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