Merge pull request #56 from hirosassa/optional-dependency-import

Move tf dependency to dev-dependencies

.github/workflows/format.yml

@@ -4,7 +4,7 @@ on:
     push:
         branches: [ master ]
     pull_request:
-        branches: [ master ]
+
 
 jobs:
   formatting-check:
@@ -14,7 +14,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Install dependencies
+      run: |
+        pip install toml yapf
     - name: run YAPF to test if python code is correctly formatted
-      uses: AlexanderMelde/yapf-action@master
-      with:
-        args: --verbose --style=yapf.ini
+      run: |
+        yapf --diff --recursive --verbose $GITHUB_WORKSPACE

README.md

@@ -6,3 +6,8 @@
 ![](https://img.shields.io/pypi/l/redshells)
 
 Machine learning tasks which are used with data pipeline library "luigi" and its wrapper "gokart".
+
+## Dependencies
+
+You should add `tensorflow = ">=1.13.1,<2.0"` on your app dependencies if you would like to use some models under `redshells/contrib` directory.
+`Tensorflow` is not included redshells' dependencies because there are some models not used it.