Shuffle two list at once with same order

Question

I'm using the nltk library's movie_reviews corpus which contains a large number of documents. My task is get predictive performance of these reviews with pre-processing of the data and without pre-processing. But there is problem, in lists documents and documents2 I have the same documents and I need shuffle them in order to keep same order in both lists. I cannot shuffle them separately because each time I shuffle the list, I get other results. That is why I need to shuffle the at once with same order because I need compare them in the end (it depends on order). I'm using python 2.7

Example (in real are strings tokenized, but it is not relative):

documents = [(['plot : two teen couples go to a church party , '], 'neg'),              (['drink and then drive . '], 'pos'),              (['they get into an accident . '], 'neg'),              (['one of the guys dies'], 'neg')]  documents2 = [(['plot two teen couples church party'], 'neg'),               (['drink then drive . '], 'pos'),               (['they get accident . '], 'neg'),               (['one guys dies'], 'neg')] 

And I need get this result after shuffle both lists:

documents = [(['one of the guys dies'], 'neg'),              (['they get into an accident . '], 'neg'),              (['drink and then drive . '], 'pos'),              (['plot : two teen couples go to a church party , '], 'neg')]  documents2 = [(['one guys dies'], 'neg'),               (['they get accident . '], 'neg'),               (['drink then drive . '], 'pos'),               (['plot two teen couples church party'], 'neg')] 

I have this code:

def cleanDoc(doc):     stopset = set(stopwords.words('english'))     stemmer = nltk.PorterStemmer()     clean = [token.lower() for token in doc if token.lower() not in stopset and len(token) > 2]     final = [stemmer.stem(word) for word in clean]     return final  documents = [(list(movie_reviews.words(fileid)), category)              for category in movie_reviews.categories()              for fileid in movie_reviews.fileids(category)]  documents2 = [(list(cleanDoc(movie_reviews.words(fileid))), category)              for category in movie_reviews.categories()              for fileid in movie_reviews.fileids(category)]  random.shuffle( and here shuffle documents and documents2 with same order) # or somehow 

Answer 1

You can do it as:

import random  a = ['a', 'b', 'c'] b = [1, 2, 3]  c = list(zip(a, b))  random.shuffle(c)  a, b = zip(*c)  print a print b  [OUTPUT] ['a', 'c', 'b'] [1, 3, 2] 

Of course, this was an example with simpler lists, but the adaptation will be the same for your case.

Hope it helps. Good Luck.