GAE ImportError: dynamic module does not define init function (init_mysql)

My staging GAE app throws the below err,

File "/base/data/home/apps/foo156801/worker:20170301t222555.399535951340506041/lib/MySQLdb/__init__.py", line 19, in <module>
import _mysql
ImportError: dynamic module does not define init function (init_mysql)

which was exactly same as this. According to the answer given on that link, I have changed my app.yaml MysqlDb version and the local mysqldb version to points to a same version. But no luck. Still I got the above error.

app.yaml

libraries:
 - name: jinja2
   version: latest
 - name: MySQLdb
   version: "1.2.5"

requirements.txt

Flask-API==0.6.9
MySQL-python==1.2.5

Copyright Notice：Content Author:「Avinash Raj」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/42539476/gae-importerror-dynamic-module-does-not-define-init-function-init-mysql