update readme.py

snippets/count_occurences.md

@@ -1,5 +1,7 @@
 ### count_occurences
 
+:information_source: Already implemented via `list.count()`.
+
 Counts the occurrences of a value in an list.
 
 Uses the `reduce` functin from built-in module `functools` to increment a counter each time you encounter the specific value inside the list.

snippets/shuffle.md

@@ -1,5 +1,7 @@
 ### shuffle
 
+:information_source: The same algorithm is already implemented via `random.shuffle`.
+
 Randomizes the order of the values of an list, returning a new list.
 
 Uses the [Fisher-Yates algorithm](https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle) to reorder the elements of the list.