Create python-app.yml (#16)

* Create python-app.yml

* Fix flake8 error "undefined n"

* Comment out flake8 checks in workflow

There many issues found by flake8. THey are to be fixed in a separate
branch.

* Add manually requirements to the workflow description.

Proper way is to convert current setup.py to pyproject.toml.

* Fix pytest working dir in workflow.

Author: travleev

.github/workflows/python-app.yml

@@ -0,0 +1,40 @@
+# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Python application
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v3
+      with:
+        python-version: "3.10"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pytest six chardet
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    # - name: Lint with flake8
+    #   run: |
+    #     # stop the build if there are Python syntax errors or undefined names
+    #     flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+    #     # 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: Test with pytest
+      run: |
+        cd tests
+        pytest

numjuggler/ri_notation.py

@@ -2,7 +2,7 @@
 Print out a list using "i" identifiers for inserting and repeating, as in MCNP.
 
 This is for a list of cells, where repititions and multiplication by a constant
-are not possible or saldom.
+are not possible or seldom.
 
 """
 
@@ -59,11 +59,13 @@ def expand(list_):
     they are expanded.
     """
     es = None
+    # this value not actually used. Set only to avoid checker warning about undefined n 
+    n = -1
     for e in list_:
         if es is not None:
             e = float(e)
-            d = (e - es) / (n+1)
-            for i in range(1, n+2):
+            d = (e - es) / (n + 1)
+            for i in range(1, n + 2):
                 yield es + d*i
             es = None
             ep = e