Tighten up psf/black and flake8 (#2024)

* Tighten up psf/black and flake8

* Fix some tests

* Fix some E741

* Fix some E741

* updating DIRECTORY.md

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

data_structures/binary_tree/treap.py

@@ -1,3 +1,5 @@
+# flake8: noqa
+
 from random import random
 from typing import Tuple
 
@@ -161,7 +163,8 @@ def main():
     """After each command, program prints treap"""
     root = None
     print(
-        "enter numbers to create a tree, + value to add value into treap, - value to erase all nodes with value. 'q' to quit. "
+        "enter numbers to create a tree, + value to add value into treap, "
+        "- value to erase all nodes with value. 'q' to quit. "
     )
 
     args = input()