Add mypy to the dev dependencies. (#415)

.gitignore

@@ -74,3 +74,5 @@ cscope.files
 cscope.out
 sqlite_*.db
 _version.py
+.mypy_cache/
+.eggs/

Makefile

@@ -61,4 +61,10 @@ checkbuild:
 	python setup.py sdist bdist_wheel
 	twine check dist/*
 
+mypy:
+	mypy --ignore-missing-imports aioodbc
+
+mypy_strict:
+	mypy --strict --ignore-missing-imports aioodbc
+
 .PHONY: all flake test vtest cov clean doc

aioodbc/__init__.py

@@ -5,11 +5,19 @@
 
 from ._version import version, version_tuple
 from .connection import Connection, connect
+from .cursor import Cursor
 from .pool import Pool, create_pool
 
 __version__ = version
 __version_tuple__ = version_tuple
-__all__ = ("connect", "Connection", "create_pool", "Pool", "dataSources")
+__all__ = (
+    "connect",
+    "Connection",
+    "create_pool",
+    "Pool",
+    "dataSources",
+    "Cursor",
+)
 
 
 async def dataSources(loop=None, executor=None):

aioodbc/utils.py

@@ -1,19 +1,20 @@
 from collections.abc import Coroutine
+from typing import Dict, Union
 
 from pyodbc import Error
 
 # Issue #195.  Don't pollute the pool with bad conns
 # Unfortunately occasionally sqlite will return 'HY000' for invalid query,
 # so we need specialize the check
-_CONN_CLOSE_ERRORS = {
+_CONN_CLOSE_ERRORS: Dict[str, Union[str, None]] = {
     # [Microsoft][ODBC Driver 17 for SQL Server]Communication link failure
     "08S01": None,
     # [HY000] server closed the connection unexpectedly
     "HY000": "[HY000] server closed the connection unexpectedly",
 }
 
 
-def _is_conn_close_error(e):
+def _is_conn_close_error(e: Exception) -> bool:
     if not isinstance(e, Error) or len(e.args) < 2:
         return False
 

requirements-dev.txt

@@ -5,9 +5,9 @@ black==23.3.0
 flake8-bugbear==23.3.23
 flake8==6.0.0
 ipdb==0.13.13
-twine==4.0.2
 ipython==8.12.0
 isort==5.12.0
+mypy==1.1.1
 pyodbc==4.0.35
 pytest-asyncio==0.21.0
 pytest-cov==4.0.0
@@ -16,4 +16,5 @@ pytest-sugar
 pytest==7.2.2
 sphinx==6.1.3
 sphinxcontrib-asyncio==0.3.0
+twine==4.0.2
 uvloop==0.17.0