Question

I’m writing a utility in Python that will attach changed files in Subversion to an email and send it when a subset of folders that are under source control in SVN have been changed. I am using the pysvn library to access the repository.

I have a copy of the files on my local file system and I do an update to check if the files have changed since the last time the utility was run.

I am at the point where I am translating the path names in SVN to the path names on my local copy.

Currently I have written the following to do the job:

def formatPaths(self, paths):     newPaths = list()     for path in paths:         path = path[len(self.basePath):]         path = path.replace('/', '\\')         newPaths.append(path)     return newPaths 

self.basePath would be something like ‘/trunk/project1’ and I’m looking to just get the relative path of a subset of folders (I.e. folder1 under ‘/trunk/project1’).

Is this a good way to solve this problem or is there some magical function I missed?

Answer 1

Stay with the slice operator, but do not change the loop variable inside the loop. for fun, try the generator expression (or keep the listcomp).

baselen = len(self.basePath) return (path[baselen:].replace('/', '\\') for path in paths) 

Edit: `lstrip()’ is not relevant here. From the manual:

str.lstrip([chars])

Return a copy of the string with leading characters removed. If chars is omitted or None, whitespace characters are removed. If given and not None, chars must be a string; the characters in the string will be stripped from the beginning of the string this method is called on.