Python中带有附加的简单循环

Question

I want to get a loop, so instead of writing me code such:

tfidf = vectorizer.fit_transform([ data[0]['body'] , data[1]['body'] , data[2]['body'] , data[3]['body'] ....  ])

I get it in a loop. So far I have tried:

for i in range(len(data) - 1):
    tfidf = vectorizer.fit_transform([ append(data[i]['body']) , data[i+1]['body']) ])

Any idea on how to make it work? I get the following error:

name 'append' is not defined

Answer 1

You need to call append() on a list. eg MyList.append(element)

Answer 2

I guess you want to extract the 'body' content from the json data and have a list of text elements to then pass it to the feature extractor (make sure you have preprocessed the text before).

Try this:

    tfidf = vectorizer.fit_transform([d['body'] for d in data])

Or, if it is more clear to you, you can create the list first and then pass it to the function:

bodies = [d['body'] for d in data]
tfidf = vectorizer.fit_transform(bodies)

Hope it helps :)

Happy coding !!!

PD: I haven't tested the code, but I think the idea is clear.