Soory by the new message with same question. The goup said my subject was messy and the previous message was denied. Please ignore.
2012/6/25 Developer Ecofunds <ecofunds.develo...@gmail.com> > Hello guys, > > I'd like to ask you a little question about a script I did and isn't > working properly. > It is one excercise from googles python classes < > http://code.google.com/edu/languages/google-python-class/set-up.html> > > I'm using python 2.5 because it's the one works with Google App Engine < > https://developers.google.com/appengine/docs/python/gettingstarted/> > > This is the problem: > > ##########################3 > > # B. front_x > # Given a list of strings, return a list with the strings > # in sorted order, except group all the strings that begin with 'x' first. > # e.g. ['mix', 'xyz', 'apple', 'xanadu', 'aardvark'] yields > # ['xanadu', 'xyz', 'aardvark', 'apple', 'mix'] > # Hint: this can be done by making 2 lists and sorting each of them > # before combining them. > > # This is the code I did -- Romulo. > > def front_x(words): > x_list = [] > for string in words: > if string[0]=='x': > x_list.append(string) > words.remove(string) > sorted(words) > sorted(x_list) > x_list.extend(words) > return x_list > > ############################## > > The problem with this code is that it only gets the first word beginning > with x and the others remaisn on the original list, sorted at the end. I've > tested on terminal many parts of the code and it whas fine, but when I run > it complete, it does not work. > > Following is the solution of the problem. I can understand it, I just > can't understand why my code does not work. > > ############################# > def front_x(words): > x_list = [] > other_list = [] > for w in words: > if w.startswith('x'): > x_list.append(w) > else: > other_list.append(w) > return sorted(x_list) + sorted(other_list) > ############################## > > To download all the exercises, access: > http://code.google.com/edu/languages/google-python-class/google-python-exercises.zip > > > Thank y'all. > > > >
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