This is not intended to be a secure way to generate passwords. In fact, it is probably extremely insecure, I am pretty sure someone smarter than me might be able to take 2 generated passwords and deduce their shared salt.
It is a pretty fun way to learn new words though.
If nltk.corpus changes the order or size of the words dictionary, this program will not generate the same password it used to, and will be proven useless as a password MANAGER. So, probably save any passwords generated to a keychain or something, or snapshot the words list at the time of generation and use that forever.
$ pipenv run python3
>>>import nltk
>>> nltk.download()
NLTK Downloader
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d) Download l) List u) Update c) Config h) Help q) Quit
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Downloader> d
Download which package (l=list; x=cancel)?
Identifier> words
Downloading package words to /home/trisimix/nltk_data...
Package words is already up-to-date!
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d) Download l) List u) Update c) Config h) Help q) Quit
---------------------------------------------------------------------------
Downloader> q
True
>>> exit()
$ pipenv run python3 936.py