chore: build and github actions

.flake8

@@ -0,0 +1,6 @@
+[flake8]
+max-line-length = 88
+select = C,E,F,W,B,B950
+ignore = E203, E501, W503
+exclude = *tests/*, *old_graph*
+per-file-ignores = __init__.py:F401

.github/workflows/create-release.yml

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+name: release-version
+on: 
+  workflow_dispatch:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    runs-on: ubuntu-20.04    
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: Gr1N/setup-poetry@v4
+      - name: Build package
+        run: |
+          export RELEASE_VERSION="${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+          poetry version ${RELEASE_VERSION}
+          poetry build
+      - name: Upload package
+        run: |
+          RELEASE_VERSION="${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+          echo ${{secrets.GITHUB_TOKEN}} | gh auth login --with-token
+          gh release upload --clobber ${RELEASE_VERSION} ./dist/*.tar.gz ./dist/*.whl
+      

.github/workflows/on-pull-request.yml

@@ -0,0 +1,76 @@
+name: on-pull-request
+on: [workflow_dispatch,pull_request]
+jobs:
+  build-n-test:
+    env:
+      POETRY_CACHE_FOLDER: '/home/runner/.cache/pypoetry/virtualenvs'
+      JUNIT_REPORT_PATH: pytest-junit-report
+    runs-on: ubuntu-20.04    
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - uses: Gr1N/setup-poetry@v4
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ${{ env.POETRY_CACHE_FOLDER }}
+          key:  poetry-pr-${{ runner.os }}-${{ hashFiles('poetry.lock') }}
+      - run: poetry install
+      - id: back-check
+        run: poetry run black --check .
+        continue-on-error: true
+      - id: flake8
+        run: poetry run flake8
+        continue-on-error: true
+      - id: pytest
+        run: |
+          [ -d pytest-cov-report ] || mkdir -p pytest-cov-report
+          [ -d ${JUNIT_REPORT_PATH} ] || mkdir -p ${JUNIT_REPORT_PATH}
+          poetry run pytest --junitxml=${JUNIT_REPORT_PATH}/report.xml --cov=pytest-cov-report --cov-report=xml
+        continue-on-error: true
+      - id: collect-pytest-reports
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: pytest-report
+          path: pytest-junit-report
+      - id: collect-pytest-cov-reports
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: pytest-cov-report
+          path: pytest-cov-report
+      - name: Display JUnit results
+        if: always()
+        uses: EnricoMi/publish-unit-test-result-action@v1
+        with:
+          files: ${{env.JUNIT_REPORT_PATH}}/*.xml
+      - name: check tests results
+        run: |
+          TEST_FAILED=0
+          if [ ${{steps.back-check.outcome}} != 'success' ]; then
+             echo "black failed, result was: ${{steps.back-check.outcome}}"
+             TEST_FAILED=1
+          else
+            echo "black passed"
+          fi
+          if [ ${{steps.flake8.outcome}} != 'success' ]; then
+             echo "flake8 failed, result was: ${{steps.flake8.outcome}}"
+             TEST_FAILED=1
+          else
+            echo "flake8 passed"
+          fi
+          if [ ${{steps.pytest.outcome}} != 'success' ]; then 
+            echo "pytest failed, result was: ${{steps.pytest.outcome}}"
+            TEST_FAILED=1
+          else
+            echo "pytest passed"
+          fi
+          
+          if [ ${TEST_FAILED} -ne 0 ]; then
+            exit 1
+          fi
+          
+