[Tutor] Help please

[Peter Otten]

Alan Gauld wrote:

[Ruben Pinedo]

> def process_file(filename):
>     hist = dict()
>     fp = open(filename)
>     for line in fp:
>         process_line(line, hist)
>     return hist
> 
> def process_line(line, hist):
>     line = line.replace('-', ' ')
> 
>     for word in line.split():
>         word = word.strip(string.punctuation + string.whitespace)
>         word = word.lower()
> 
>         hist[word] = hist.get(word, 0) + 1

[Alan Gauld]

> If so you need to fix the bugs in process_line() and
> process_file(). I don;t know if these are deliberate bugs
> or somebody is just sloppy. But neither work as expected
> right now. (Hint: Consider the return values of each)
 
I fail to see the bug. 

process_line() mutates its `hist` argument, so there's no need to return 
something. Or did you mean something else that escapes me?