Codestyle for admin package.

app/admin/forms.py

 from flask_wtf import FlaskForm
-from wtforms import StringField, BooleanField, SelectField, SubmitField
-from wtforms.validators import DataRequired, Length, Email, Regexp
-from wtforms import ValidationError
+from wtforms import (BooleanField, SelectField, StringField, SubmitField,
+                     ValidationError)
+from wtforms.validators import DataRequired, Email, Length, Regexp
 from ..models import Role, User
 
 
 class EditProfileAdminForm(FlaskForm):
-    email = StringField('Email', validators=[DataRequired(), Length(1, 64),
-                                             Email()])
-    username = StringField('Username', validators=[
-        DataRequired(), Length(1, 64),
-        Regexp('^[A-Za-z][A-Za-z0-9_.]*$', 0,
-               'Usernames must have only letters, numbers, dots or '
-               'underscores')])
+    email = StringField('Email',
+                        validators=[DataRequired(), Length(1, 64), Email()])
+    username = StringField(
+        'Username',
+        validators=[
+            DataRequired(),
+            Length(1, 64),
+            Regexp(
+                '^[A-Za-z][A-Za-z0-9_.]*$',
+                0,
+                'Usernames must have only letters, numbers, dots or '
+                'underscores'
+            )
+        ]
+    )
     confirmed = BooleanField('Confirmed')
     role = SelectField('Role', coerce=int)
     name = StringField('Real name', validators=[Length(0, 64)])

app/admin/views.py

-from flask import (abort, current_app, flash, redirect, request,
-                   render_template, url_for, send_from_directory)
-from flask_login import current_user, login_required
-from .forms import EditProfileAdminForm
-from ..models import Corpus, User, Role, Job
-from ..tables import AdminUserTable, AdminUserItem
+from app.utils import background_delete_user
+from flask import current_app, flash, redirect, render_template, url_for
+from flask_login import login_required
 from . import admin
-from ..decorators import admin_required
+from .forms import EditProfileAdminForm
 from .. import db
+from ..decorators import admin_required
+from ..models import Role, User
+from ..tables import AdminUserTable, AdminUserItem
 import threading
-from app.utils import background_delete_user
 
 
 @admin.route('/overview', methods=['GET', 'POST'])
@@ -16,39 +15,52 @@ from app.utils import background_delete_user
 @admin_required
 def for_admins_only():
     users = User.query.order_by(User.username).all()
-    items = [AdminUserItem(u.username, u.email, u.role_id, u.confirmed, u.id) for u in users]
-    table = AdminUserTable(items).__html__()  # converts table object to html string
-    table = table.replace('tbody', 'tbody class="list"', 1)  # add class list to tbody element. Needed by list.js
-    return render_template('admin/admin.html.j2', title='Administration tools',
-                           table=table)
+    items = [AdminUserItem(u.username, u.email, u.role_id, u.confirmed, u.id)
+             for u in users]
+    # Convert table object to html string
+    table = AdminUserTable(items).__html__()
+    # Add class "list" to tbody element. Needed for "List.js"
+    table = table.replace('tbody', 'tbody class="list"', 1)
+    return render_template('admin/admin.html.j2',
+                           table=table,
+                           title='Administration tools')
 
 
-@admin.route('/overview/admin_user_page/<int:user_id>', methods=['GET', 'POST'])
+@admin.route('/overview/admin_user_page/<int:user_id>',
+             methods=['GET', 'POST'])
 @login_required
 @admin_required
 def admin_user_page(user_id):
     selected_user = User.query.filter_by(id=user_id).first()
-    title = 'Administration of user {} with ID: {}'.format(selected_user.username,
-                                                           selected_user.id)
-    registration_date = selected_user.registration_date.strftime('%A, %e %B %H:%M')
+    title = 'Administration of user {} with ID: {}'.format(
+        selected_user.username,
+        selected_user.id
+    )
+    registration_date = selected_user.registration_date.strftime(
+        '%A, %e %B %H:%M'
+    )
     return render_template('admin/admin_user_page.html.j2',
-                           title=title, selected_user=selected_user,
-                           registration_date=registration_date)
+                           registration_date=registration_date,
+                           selected_user=selected_user,
+                           title=title)
 
 
-@admin.route('/overview/admin_user_page/delete/<int:user_id>', methods=['GET', 'POST'])
+@admin.route('/overview/admin_user_page/delete/<int:user_id>',
+             methods=['GET', 'POST'])
 @login_required
 @admin_required
 def admin_delete_user(user_id):
-    delete_thread = threading.Thread(target=background_delete_user,
-                                     args=(current_app._get_current_object(),
-                                           user_id))
+    delete_thread = threading.Thread(
+        target=background_delete_user,
+        args=(current_app._get_current_object(), user_id)
+    )
     delete_thread.start()
     flash('User {} has been deleted!'.format(user_id))
     return redirect(url_for('admin.for_admins_only'))
 
 
-@admin.route('/overview/admin_user_page/edit_profile_admin/<int:user_id>', methods=['GET', 'POST'])
+@admin.route('/overview/admin_user_page/edit_profile_admin/<int:user_id>',
+             methods=['GET', 'POST'])
 @login_required
 @admin_required
 def edit_profile_admin(user_id):
@@ -67,9 +79,11 @@ def edit_profile_admin(user_id):
     form.username.data = user.username
     form.confirmed.data = user.confirmed
     form.role.data = user.role_id
-    title = 'Edit profile of user {} with ID {}'.format(user.username,
-                                                        user.id)
+    title = 'Edit profile of user {} with ID {}'.format(
+        user.username,
+        user.id
+    )
     return render_template('admin/edit_profile_admin.html.j2',
                            form=form,
-                           user=user,
-                           title=title)
+                           title=title,
+                           user=user)