"Frank Chang" <frankchan...@gmail.com> wrote
Good morning, I am using Python 2.7.1 on Windows XP Service Pack 3.
Here
is the program where the Python interpreter complains about
NameError:
global name 'levenshtein_automata' is not defined.
The others have answered the specific question, however I think you
have another problem lurking:
def find_all_matches(self, word, k, lookup_func):
lev = levenshtein_automata(word, k).to_dfa()
match = lev.next_valid_string('\0')
while match:
next = lookup_func(match)
if not next:
return
Here you return a None value
if match == next:
yield match
next1 = next1 + '\0'
match = lev.next_valid_string(next1)
length = len(list(testdfa.find_all_matches('food', 1, m))) ########
line 174
And here you try to convert the return value to a list.
But list(None) will fail with a TypeError.
You should probably returm an empty string or raise an exception
and catch it in your main block.
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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