init

utils/__init__.py

@@ -0,0 +1,2 @@
+#!/usr/bin/env python3
+# -*- coding:utf-8 -*-

utils/str_translator.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+# -*- coding:utf-8 -*-
+import re
+
+
+# noinspection PyPep8Naming
+def snake_case_to_PascalCase(s: str):
+    """
+    Convert snake_case string to PascalCase.
+    """
+    return ''.join(word.capitalize() for word in s.split('_'))
+
+
+# noinspection PyPep8Naming
+def PascalCase_to_snake_case(s: str):
+    """
+    Convert PascalCase string to snake_case.
+    """
+    return re.sub(r'(?<!^)(?=[A-Z])', '_', s).lower()
+
+
+if __name__ == '__main__':
+    print(snake_case_to_PascalCase('my_data'))
+    print(PascalCase_to_snake_case('MyData'))