Makefile, MyPy error fix

Makefile

@@ -0,0 +1,16 @@
+build:
+	python -m build
+
+upload:
+	python -m twine upload dist/*
+
+clean:
+	rm -rf dist/
+	rm -rf showdialog/__pycache__/
+
+check:
+	python -m mypy .
+	python -m pylint -j 4 ./showdialog
+
+format:
+	python -m autopep8 -r --in-place ./showdialog

showdialog/__init__.py

@@ -1,10 +1,11 @@
 """Simple module for showing GTK dialog"""
 
+from typing import Union, Optional, Tuple
+
 import gi  # type: ignore
 gi.require_version('Gtk', '3.0')
 
 from gi.repository import Gtk  # type: ignore
-from typing import Union, Optional, Tuple  # type: ignore
 
 TxtTuple = Tuple[Optional[str], bool]
 TxtType = Union[TxtTuple, Optional[str]]