Благодаря Дору и Тим Хофман,
Проблемът беше MySQLDb, който не беше в app.yaml, разположих и показва друга грешка.
Ще отворя друг въпрос.
Решението е:
app.yaml
application: vuush
version: 1
runtime: python27
api_version: 1
threadsafe: yes
handlers:
- url: .*
script: main.app
libraries:
- name: jinja2
version: "2.6"
- name: markupsafe
version: "0.15"
- name: MySQLdb
version: "1.2.4"
requirements.txt
Flask==0.10.1
Flask-SQLAlchemy==1.0
Flask-WTF==0.9.4
Jinja2==2.7.1
MarkupSafe==0.18
MySQL-python==1.2.4
WTForms==1.0.5
Werkzeug==0.9.6
BeautifulSoup==3.2.1
requests==2.2.1