sqlite3.InterfaceError: Error binding parameter 0 - probably unsupported type.

[snippsat]

but i have already connected it with the database...it is just not able to submit the data

It may not be connected,look at link in your error.
@Background on this error at: http://sqlalche.me/e/rvf5

Exception raised for errors that are related to the database interface rather than the database itself.
This error is a DBAPI Error and originates from the database driver (DBAPI), not SQLAlchemy itself.
The InterfaceError is sometimes raised by drivers in the context of the database connection being dropped, or not being able to connect to the database.
For tips on how to deal with this, see the section Dealing with Disconnects.

I have tested and done a lot with databases in Flask,but i would not deal with SQLAlchemy directly when Flask-SQLAlchemy dos this job so good.

@Flask-SQLAlchemy
It aims to simplify using SQLAlchemy with Flask by providing useful defaults and extra helpers that make it easier to accomplish common tasks.