Improve pylint score (#142)

* fix: errors to improve pylint scores

* fix: test

* fix

* add: flake ignore rule to pip8speaks conf

* fix

* add: test patterns to deepsource conf

.deepsource.toml

@@ -3,6 +3,9 @@ version = 1
 [[analyzers]]
 name = "python"
 enabled = true
-
+test_patterns = [
+  "tests/**",
+  "test_*.py"
+]
   [analyzers.meta]
-  runtime_version = "3.x.x"
+  runtime_version = "3.x.x"