Build error if you try to use Light fm data sets about lightfm

[maciejkula]

Can you:

1. Check where it's looking for the data (the zip_path above)?
2. Check that the file at that path is a valid zip file?
3. Try deleting that file and its directory and run the command again.

My first suspicion is that there might have been a problem with the download and you have a partially completed file cached in the data directory.

[maciejkula]

Any luck?

[maciejkula]

?

[anshulg8]

You need to update zip_path in lightfm/datasets/movielens.py

[maciejkula]

Are you saying that the code doesn't work? Could you post the trace for the error you encountered?

[anshulg8]

I was stuck in a similar issue, which I posted here.
All I had to do was replace this:

zip_path = _common.get_data(data_home,
                            ('https://github.com/maciejkula/'
                             'lightfm_datasets/releases/'
                             'download/v0.1.0/movielens.zip'),
                            'movielens100k',
                            'movielens.zip',
                            download_if_missing)

with

zip_path = _common.get_data(data_home,
                            ('https://github.com/maciejkula/
                            lightfm_datasets/releases/
                            download/v0.1.0/movielens.zip'),
                            'movielens100k',
                            'movielens.zip',
                            download_if_missing)

[maciejkula]

Can you point out the difference between the two? I don't quite see it!

[anshulg8]

The 4 extra apostrophes(') in the URL were creating problem for me.

[maciejkula]

Are you use? Python uses what's called implicit string concatenation; these quotes are simply dropped in the final string. Your changed code is syntactically identical.

[anshulg8]

It didn't work for me, I am using Python3.6

[ParikshitSinghTomar]

Thanks @anshulg8, for pointing url. While my problem not solved by the help of above solution. What I tried written below.

1. Copy path and download zip file
2. Replace below code
   data = fetch_movielens(min_rating=4.0)

with
def _read_raw_data(path):
with zipfile.ZipFile(path) as datafile:
return (datafile.read('ml-100k/ua.base').decode().split('\n'),
datafile.read('ml-100k/ua.test').decode().split('\n'),
datafile.read('ml-100k/u.item').decode(errors='ignore').split('\n'),
datafile.read('ml-100k/u.genre').decode(errors='ignore').split('\n'))

data=_read_raw_data('movielens.zip')
I know this is not right way but I tried it and it works perfect.

[maciejkula]

This is not a bug in the code. Your download was corrupted for some reason. Delete the downloaded file and the code should work again. The advice above (wrt changing paths) is incorrect.

[maciejkula]

This problem is solved in the newest release, 1.14.