Replace bandit, flake8, isort, and pyupgrade with ruff (#8178)

* Replace bandit, flake8, isort, and pyupgrade with ruff

* Comment on ruff rules

* updating DIRECTORY.md

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

strings/check_anagrams.py

@@ -2,7 +2,6 @@
 wiki: https://en.wikipedia.org/wiki/Anagram
 """
 from collections import defaultdict
-from typing import DefaultDict
 
 
 def check_anagrams(first_str: str, second_str: str) -> bool:
@@ -30,7 +29,7 @@ def check_anagrams(first_str: str, second_str: str) -> bool:
         return False
 
     # Default values for count should be 0
-    count: DefaultDict[str, int] = defaultdict(int)
+    count: defaultdict[str, int] = defaultdict(int)
 
     # For each character in input strings,
     # increment count in the corresponding

strings/word_occurrence.py

@@ -1,7 +1,6 @@
 # Created by sarathkaul on 17/11/19
 # Modified by Arkadip Bhattacharya(@darkmatter18) on 20/04/2020
 from collections import defaultdict
-from typing import DefaultDict
 
 
 def word_occurrence(sentence: str) -> dict:
@@ -15,7 +14,7 @@ def word_occurrence(sentence: str) -> dict:
     >>> dict(word_occurrence("Two  spaces"))
     {'Two': 1, 'spaces': 1}
     """
-    occurrence: DefaultDict[str, int] = defaultdict(int)
+    occurrence: defaultdict[str, int] = defaultdict(int)
     # Creating a dictionary containing count of each word
     for word in sentence.split():
         occurrence[word] += 1