String manipulation questions
duncan.booth at invalid.invalid
Wed Apr 9 09:32:55 EDT 2008
goldtech <goldtech at worldpost.com> wrote:
> Question1: The replace method - If a string does not have the target
> replacement "newstring", then newline equals oldstring? Ie. oldstring
> is not changed in any way? Seems to be what I observe but just want to
> confirm this.
> Question2: I'm using "line.find(newstring) != -1..." because I want
> to print when a replacement happens. Does "line.replace..." report
> indirectly somehow when it replaces?
Just do the line.replace() and then test for a change.
Question 3 (which I'm sure you meant to ask really) ...
No, you shouldn't be using a while loop here. Use a for loop and the
for counter, line in enumerate(fileIN):
newline = line.replace(oldstring, newstring)
if newline != line:
print 'match at line', counter+1
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