enable flake8 check

Author: lilyhe123

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+ignore = E203, E501, W503

.pre-commit-config.yaml

@@ -13,10 +13,10 @@ repos:
     hooks:
       - id: black
     # A popular Python linter that combines pycodestyle, pyflakes, and McCabe complexity.
-  # - repo: https://github.com/PyCQA/flake8
-  #   rev: 7.2.0
-  #   hooks:
-  #     - id: flake8
+  - repo: https://github.com/PyCQA/flake8
+    rev: 7.2.0
+    hooks:
+      - id: flake8
   # Sorts Python imports alphabetically and automatically separates them into sections
   - repo: https://github.com/pycqa/isort
     rev: 6.0.1

daily.py

@@ -515,7 +515,7 @@ def test_58():
   construct by a hash list
   getHashByLevel(level)->List
 """
-from hashlib import md5
+# from hashlib import md5
 
 
 # MarkleTree is a binary tree, every node mostly has two child: