cleanup dependencies organization into requirements.txt files

.github/workflows/python-package.yml

@@ -27,8 +27,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 mypy
-        pip install -r tests/requirements.txt
+        pip install -r requirements.txt
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

.travis.yml

@@ -6,9 +6,7 @@ python:
   - "3.9"
 # command to install dependencies
 install:
-  - pip install flake8
-  - pip install mypy
-  - pip install -r tests/requirements.txt
+  - pip install -r requirements-dev.txt
 # check PEP8 coding standard with flake8 and typing with mypy
 before_script:
   - flake8 .

README.md

@@ -291,13 +291,16 @@ Detailed logging of device register operations can be enabled with:
     ina = INA219(SHUNT_OHMS, log_level=logging.DEBUG)
 ```
 
-## Testing
+## Development
 
-Install test dependencies first _(recommended to use virtual environments)_:
+Install development dependencies first _(recommended to use virtual environments)_. This includes
+package dependencies, testing dependencies and static analysis dependencies.
 ```shell
-pip3 install -r tests/requirements.txt
+pip3 install -r requirements-dev.txt
 ```
 
+### Testing
+
 ```shell
 python3 -m unittest discover -s tests -p 'test_*.py'
 ```
@@ -316,7 +319,13 @@ coverage report -m
 coverage xml
 ```
 
-## Coding Standard
+### Coding Standard
 
 This library adheres to the _PEP8_ standard and follows the _idiomatic_
 style described in the book _Writing Idiomatic Python_ by _Jeff Knupp_.
+
+To perform local linting and type checks, run:
+```sh
+flake8 .
+mypy -p ina219 --strict
+```

requirements-dev.txt

@@ -0,0 +1,5 @@
+-r ./requirements.txt
+-r ./tests/requirements.txt
+
+flake8
+mypy

requirements.txt

@@ -0,0 +1 @@
+Adafruit_GPIO==1.0.1

tests/requirements.txt

@@ -1,4 +1,3 @@
-Adafruit_GPIO==1.0.1
 mock==2.0.0
 coverage==5.1
 codecov>=2.1