Add some Python stuff.

.flake8

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+[flake8]
+ignore = E203, E501, E226, F403, F405, E302,
+    W503, E305, E228, E227, E231, E251, E129,
+    E131, U101
+
+# vim: ft=dosini

.gitignore

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+*.sqlite3

mypy.ini

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+[mypy]
+check_untyped_defs = True
+no_implicit_optional = True
+strict_optional = True
+strict_equality = True
+
+warn_redundant_casts = True
+warn_unused_ignores = True
+warn_return_any = True
+warn_no_return = True
+warn_unreachable = True
+
+disallow_untyped_defs = True
+disallow_incomplete_defs = True
+
+[mypy-tqdm,scipy,scipy.optimize]
+ignore_missing_imports = True