Removed tensorflow as dependency.

kerastuner/__init__.py

@@ -32,4 +32,7 @@
 from .tuners import Hyperband
 from .tuners import RandomSearch
 
+from .utils import check_tf_version
+check_tf_version()
+
 __version__ = '1.0.0'

kerastuner/utils.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 """Keras Tuner utilities."""
 
-
+from packaging.version import parse
 import tensorflow as tf
 
 
@@ -27,3 +27,16 @@ def create_directory(path, remove_existing=False):
     elif remove_existing:
         tf.io.gfile.rmtree(path)
         tf.io.gfile.makedirs(path)
+
+
+def check_tf_version():
+    if parse(tf.__version__) < parse('2.0.0'):
+        raise ImportError(
+            f'The Tensorflow package version needs to be at least v2.0.0 \n'
+            f'for Keras Tuner to run. Currently, your TensorFlow version is \n'
+            f'v{tf.__version__}. Please upgrade with \n'
+            f'`$ pip install --upgrade tensorflow` -> GPU version \n'
+            f'or \n'
+            f'`$ pip install --upgrade tensorflow-cpu` -> CPU version. \n'
+            f'You can use `pip freeze` to check afterwards that everything is ok.'
+        )

setup.py

@@ -29,8 +29,11 @@
     author='The Keras Tuner authors',
     author_email='[email protected]',
     license='Apache License 2.0',
+    # tensorflow isn't a dependency because it would force the
+    # download of the gpu version or the cpu version.
+    # users should install it manually.
     install_requires=[
-        'tensorflow>=2.0.0-beta1',
+        'packaging',
         'future',
         'numpy',
         'tabulate',