initial runner api

metaflow/__init__.py

@@ -146,6 +146,10 @@ class and related decorators.
 # Import data class within tuple_util but not introduce new symbols.
 from . import tuple_util
 
+# Runner API
+if sys.version_info >= (3, 7):
+    from .runner.metaflow_runner import Runner
+
 __version_addl__ = []
 _ext_debug("Loading top-level modules")
 for m in _tl_modules:

metaflow/_vendor/importlib_metadata.LICENSE

@@ -0,0 +1,13 @@
+Copyright 2017-2019 Jason R. Coombs, Barry Warsaw
+
+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.