Utilize pylint como linter y corregi la mayoria de los errores

files/__init__.py

@@ -1,14 +1,15 @@
 import os
 
 from flask import Flask, render_template
-from werkzeug import SharedDataMiddleware
+from werkzeug.wsgi import SharedDataMiddleware
 
 
 def create_app():
     app = Flask(__name__, instance_relative_config=True)
 
     app.config.from_mapping(
-        SQLALCHEMY_DATABASE_URI="sqlite:///{}".format(os.path.join(app.instance_path, 'files.sqlite')),
+        SQLALCHEMY_DATABASE_URI="sqlite:///{}".format(
+            os.path.join(app.instance_path, 'files.sqlite')),
         SQLALCHEMY_TRACK_MODIFICATIONS=False,
         USERNAME='dev',
         PASSWORD='secret',
@@ -17,7 +18,8 @@ def create_app():
     )
 
     app.config.from_pyfile('config.py')
-    app.wsgi_app = SharedDataMiddleware(app.wsgi_app, {'/uploads': app.config['UPLOAD_FOLDER']})
+    app.wsgi_app = SharedDataMiddleware(
+        app.wsgi_app, {'/uploads': app.config['UPLOAD_FOLDER']})
 
     try:
         os.makedirs(app.instance_path)
@@ -33,6 +35,9 @@ def create_app():
     from files import auth
     app.register_blueprint(auth.bp)
 
+    from files import admin
+    app.register_blueprint(admin.bp)
+
     from files import categories
     app.register_blueprint(categories.bp)