Add PEP8 style check and add bug report issue template

.github/workflows/test.yml

@@ -33,7 +33,7 @@ jobs:
     - name: Install test dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
+        pip install flake8 pytest pep8
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 
     - name: Lint with flake8
@@ -43,6 +43,11 @@ jobs:
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
+    - name: Check PEP8 python code style
+      run: |
+        find . -name \*.py -exec pep8 {} +
+
+
     - name: Test with pytest
       run: |
         pytest ../qlib
@@ -57,9 +62,4 @@ jobs:
         python scripts/get_data.py qlib_data_cn --target_dir ~/.qlib/qlib_data/cn_data
         cd examples
         estimator -c estimator/estimator_config.yaml
-        jupyter nbconvert --execute estimator/analyze_from_estimator.ipynb
-    
-    
-
-    
-    
+        jupyter nbconvert --execute estimator/analyze_from_estimator.ipynb