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netflix.py
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netflix.py
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# Copyright 2018 The Cornac Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================
"""Link to the data: https://www.kaggle.com/netflix-inc/netflix-prize-data/"""
from typing import List
from ..utils import validate_format
from ..utils import cache
from ..data import Reader
VALID_DATA_FORMATS = ['UIR', 'UIRT']
VARIANTS = ['original', 'small']
FNAME = {'small':'data_small', 'original':'data'}
def _load(fname, fmt='UIR', reader: Reader = None) -> List:
"""Load the Netflix dataset
Parameters
----------
fname: str, required
Data file name.
fmt: str, default: 'UIR'
Data format to be returned.
reader: `obj:cornac.data.Reader`, default: None
Reader object used to read the data.
Returns
-------
data: array-like
Data in the form of a list of tuples depending on the given data format.
"""
fmt = validate_format(fmt, VALID_DATA_FORMATS)
fpath = cache(url='https://static.preferred.ai/cornac/datasets/netflix/{}.zip'.format(fname),
unzip=True, relative_path='netflix/{}.csv'.format(fname))
reader = Reader() if reader is None else reader
return reader.read(fpath, fmt, sep=',')
def load_feedback(fmt='UIR', variant='original', reader: Reader = None) -> List:
"""Load Netflix user-item ratings, scale: [1,5]
Parameters
----------
fmt: str, default: 'UIR'
Data format to be returned.
variant: str, optional, default: 'original'
Specifies which Netflix dataset to load, one of ['original', 'small'].
reader: `obj:cornac.data.Reader`, default: None
Reader object used to read the data.
Returns
-------
data: array-like
Data in the form of a list of tuples depending on the given data format.
"""
if variant not in VARIANTS:
raise ValueError('variant must be one of {}.'.format(VARIANTS))
return _load(FNAME[variant], fmt, reader)