Add data minimization functionality to the ai-privacy-toolkit (#3)

* Fix directory issue when running tests for first time

* Initial version of data minimization

* Update version and documentation

* Fix documentation

apt/utils.py

@@ -2,7 +2,7 @@ from sklearn import datasets, model_selection
 import sklearn.preprocessing
 import pandas as pd
 import ssl
-from os import path
+from os import path, mkdir
 from six.moves.urllib.request import urlretrieve
 
 
@@ -40,9 +40,13 @@ def get_adult_dataset():
                 'label']
     train_url = 'https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data'
     test_url = 'https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.test'
+    data_dir = '../datasets/adult'
     train_file = '../datasets/adult/train'
     test_file = '../datasets/adult/test'
 
+    if not path.exists(data_dir):
+        mkdir(data_dir)
+
     ssl._create_default_https_context = ssl._create_unverified_context
     if not path.exists(train_file):
         urlretrieve(train_url, train_file)
@@ -139,8 +143,12 @@ def get_nursery_dataset(raw: bool = True, test_set: float = 0.2, transform_socia
     :return: Dataset and labels as pandas dataframes.
     """
     url = 'https://archive.ics.uci.edu/ml/machine-learning-databases/nursery/nursery.data'
+    data_dir = '../datasets/nursery'
     data_file = '../datasets/nursery/data'
 
+    if not path.exists(data_dir):
+        mkdir(data_dir)
+
     ssl._create_default_https_context = ssl._create_unverified_context
     if not path.exists(data_file):
         urlretrieve(url, data_file)