Python: tox -e all (iotaledger#1964)

Co-authored-by: Thibault Martinez <[email protected]>

bindings/python/tox.ini

@@ -21,7 +21,7 @@ commands =
 description = Run format checker {basepython}
 deps = autopep8
 commands =
-    autopep8 --exclude .venv  --diff --recursive --aggressive --max-line-length 120 --exit-code .
+    autopep8 --exclude env  --diff --recursive --aggressive --max-line-length 120 --exit-code .
 
 [testenv:lint-sdk]
 description = Run pylint {basepython} on iota_sdk
@@ -48,3 +48,17 @@ deps =
 commands =
     pip install .
     pylint --disable=missing-function-docstring,missing-class-docstring --rcfile=.pylintrc tests/**/*.py 
+
+[testenv:all]
+description = Helper command to ensure locally that Python CI checks will pass.
+deps =
+    -r requirements-dev.txt
+    pylint
+    autopep8
+commands =
+    autopep8 --exclude env --in-place --recursive --aggressive --max-line-length 120 --exit-code .
+    pip install .
+    pylint --rcfile=.pylintrc iota_sdk/**/*.py
+    pylint --rcfile=.pylintrc examples/**/*.py
+    pylint --disable=missing-function-docstring,missing-class-docstring --rcfile=.pylintrc tests/**/*.py 
+    pytest -v