fix(style): code style

problem/views/admin.py

@@ -1,7 +1,7 @@
 import hashlib
 import json
 import os
-import shutil
+# import shutil
 import tempfile
 import zipfile
 from wsgiref.util import FileWrapper

problem/views/oj.py

@@ -10,7 +10,7 @@ from contest.models import ContestRuleType
 class ProblemTagAPI(APIView):
     def get(self, request):
         qs = ProblemTag.objects
-        keyword = request.GET.get('keyword')
+        keyword = request.GET.get("keyword")
         if keyword:
             qs = ProblemTag.objects.filter(name__icontains=keyword)
         tags = qs.annotate(problem_count=Count("problem")).filter(problem_count__gt=0)