如何将结果从nltk函数“ most_informative_features”保存到Python中的txt文件中

Question

Sorry if this is a noobie question! I am carrying out sentiment analysis on python using nltk. It has a function which returns the most informative features but whenever i try and save the results to a text file, i get the following error 'TypeError: must be str, not list'. the code i am using is as follows

classifier.most_informative_features(100)  

str(information)
saveFile = open('informationFile.txt', 'w')

saveFile.write(information)
saveFile.close()

any ideas what i am doing wrong?

Answer 1

You need to assign the conversion from list to string to something, or do in place...

saveFile.write(''.join(information))

Applying str to a variable generates a value, but doesn't change the variable (unless you assign it)

>>> bar
['a', 'b', 'c']
>>> str(bar)
"['a', 'b', 'c']"
>>> bar
['a', 'b', 'c']
>>> ', '.join(bar)
'a, b, c'
>>> bar
['a', 'b', 'c']
>>> bar = ', '.join(bar)
>>> bar
'a, b, c'