String Conversion.

string_conversion.py

@@ -0,0 +1,15 @@
+def convert_to_snake_case(pascal_or_camel_cased_string):
+
+    snake_cased_char_list = [
+        '_' + char.lower() if char.isupper() else char
+        for char in pascal_or_camel_cased_string
+    ]
+
+    return ''.join(snake_cased_char_list).strip('_')
+
+
+# The main function converts a PascalCaseString or camelCaseString into a snake_case_string
+def main():
+    print(convert_to_snake_case('convertToSnakeCase'))
+
+main()