fixed one-time crash on import if kaggle token is not set

Author: Darel13712

README.md

@@ -1,6 +1,7 @@
 # Welcome to rs_datasets
 
-![](https://img.shields.io/badge/datasets-16-blue)
+![](https://img.shields.io/pypi/v/rs_datasets?color=%2300ccff)
+![](https://img.shields.io/badge/datasets-16-00ccff)
 
 This tool allows you download, unpack and read 
 recommender systems datasets into `pandas.DataFrame` as easy as `data = Dataset()`.

rs_datasets/anime.py

@@ -2,7 +2,6 @@
 from os.path import join, exists
 
 import datatable as dt
-from kaggle.api.kaggle_api_extended import KaggleApi
 
 from rs_datasets.generic_dataset import Dataset, safe
 
@@ -30,6 +29,7 @@ def __init__(self, path: str = None):
 
     @safe
     def _download(self, path):
+        from kaggle.api.kaggle_api_extended import KaggleApi
         logging.info('Downloading anime dataset...')
         api = KaggleApi()
         api.authenticate()

rs_datasets/retail_rocket.py

@@ -2,7 +2,6 @@
 from os.path import join, exists
 
 import datatable as dt
-from kaggle.api.kaggle_api_extended import KaggleApi
 
 from rs_datasets.generic_dataset import Dataset, safe
 
@@ -46,6 +45,7 @@ def __init__(self, path: str = None):
 
     @safe
     def _download(self, path):
+        from kaggle.api.kaggle_api_extended import KaggleApi
         logging.info('Downloading Retail Rocket dataset...')
         api = KaggleApi()
         api.authenticate()

rs_datasets/steam.py

@@ -2,7 +2,6 @@
 from os.path import join, exists
 
 import datatable as dt
-from kaggle.api.kaggle_api_extended import KaggleApi
 
 from rs_datasets.generic_dataset import Dataset, safe
 
@@ -24,6 +23,7 @@ def __init__(self, path: str = None):
 
     @safe
     def _download(self, path):
+        from kaggle.api.kaggle_api_extended import KaggleApi
         logging.info('Downloading steam dataset...')
         api = KaggleApi()
         api.authenticate()

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name='rs_datasets',
-    version='0.4.0',
+    version='0.4.1',
     author='Yan-Martin Tamm',
     author_email='darel142857@gmail.com',
     description='Tool for autodownloading recommendation systems datasets',