Utilize pylint como linter y corregi la mayoria de los errores

files/admin.py

@@ -0,0 +1,11 @@
+from flask import Flask, Blueprint, flash, request, redirect, url_for
+from flask import current_app, render_template, jsonify
+from files.auth import admin_required
+from files.models import Category, db
+
+bp = Blueprint('admin', __name__, url_prefix='/admin')
+
+
+@bp.route('/')
+def index():
+    return render_template('admin/index.html')