string operations (ctrl characters)
hnowak at cuci.nl
Thu Aug 16 10:44:48 CEST 2001
>===== Original Message From "DR" <dean at valtronics.co.za> =====
>So all I'm left with is [ and . I tried to do the same for those
>characters, but I can't seem to get rid of them.
> test15 = string.replace(test14,"\\",'')
> test16 = string.replace(test15,"[[" ,'')
>The above attempts didn't work.
>If anyone could offer any advice or suggest a better way of doing this, it
>would be great. Is there a better way of doing this ??
There are several approaches to this. I'm no regex expert, but I figure there
should be a way to dream up a regular expression that removes, or replaces,
characters with a certain value.
You don't *need* regexen for this, though. One approach could be, scanning the
string for "acceptable" characters, and replacing anything else with some
default character, or removing it.
Some untested sample code:
ALLOWED = "abcdefghijklmnopqrstuvwxyz"
# etc... The allowed characters.
newstring = ""
for c in weirdstring:
if c in ALLOWED:
newstring += c
# do nothing if you want to remove unwanted characters, or add
# something like ' newstring += " " ' for replacing, etc.
I don't know if speed is an issue... this could be slow(ish)... although
there's probably room for optimization.
More information about the Python-list