Improve bip32.py type hint (#107)

* ADD. adding mypy to dev-dependency

* ADD. targetting Python 3.7 type hint

ADD. mypy added to the static analyses step

* FIX. correcting Tuple type annotion syntax

DELETE. unnecessary conditional check of pnode in the derivation step

* REFACTOR. improving derive() method branching self-explanatory

* REFACTOR. most of HDWallet attributes can be explicitly typed since they are all required in each derivation step

* UPDATE. returning False for is_mnemonic() explicitly

* UPDATE. avoid type-converting an already defined variable

* UPDATE. including mypy check in Github action

ADD. adding a mypy exclude list which will act like a todo list in the future

Author: daehan-koreapool

.github/workflows/main.yml

@@ -28,9 +28,9 @@ jobs:
       - name: Install dependencies
         run: |
           poetry install
-      - name: Lint with flake8
+      - name: Run static analyses
         run: |
-          poetry run flake8 pycardano
+          make qa
       - name: Run unit tests
         run: |
           poetry run pytest --doctest-modules --ignore=examples --cov=pycardano --cov-config=.coveragerc --cov-report=xml

Makefile

@@ -60,8 +60,9 @@ test: ## runs tests
 test-single: ## runs tests with "single" markers
 	poetry run pytest -s -vv -m single
 
-qa: ## runs static analysis with flake8
+qa: ## runs static analyses
 	poetry run flake8 pycardano
+	poetry run mypy --install-types --non-interactive pycardano
 
 format: ## runs code style and formatter
 	poetry run isort .