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Sqlite update hook with external database

Basically i'm developing an application in python where it listens to external sqlite database changes, so far i implemented update_hook()(from this example: SQLite Data Change Notification Callbacks in Python or Bash or CLI) it worked well when i launch SQL statements in the same process however when i use external database that has now relation with my process it doesn't work.
My question is how do i listen to database changes from an external process(A) that has no relation with process(B).

SQLite has no mechanism by which another process can be notified.
You have to implement some communication mechanism outside of SQLite.

How to connect to SQLite3 database in python remotely

I use SQLite3 in python because my school computers don't allow us to install anything to python so I used the pre installed SQLite3 module.
I'm working on a program whose back end relies on an SQLite3 database, however the databases are created and stored on their computer.
Is it possible for me to "Host" an SQLite3 database on let's say a server and allow my script to access them remotely (my script could edit the database from my school computer)?
By the way, I'm using python 3.X
EDIT
i made a database api that runs in python 3, its called TaliffDb
to install type pip3 install TaliffDB in your terminal. im working on a documentation, but please do comment if you have any questions

Write an API on the remote server, yes. This could be hosted by a web framework of your choice.
You won't get a direct network connection to a file

using mysql instead of sqlite3

im working on python application that requiring database connections..I had developed my application with sqlite3 but it start showing the error(the database is locked).. so I decided to use MySQL database instead.. and it is pretty good with no error..
the only one problem is that I need to ask every user using my application to install MySQL server on his pc (appserv for example) ..
so can I make mysql to be like sqlite3 apart of python lib. so I can produce a python script can be converted into exe file by the tool pyInstaller.exe and no need to install mysql server by users???
update:
after reviewing the code I found opened connection not closed correctly and work fine with sqllite3 ..thank you every body

It depends (more "depends" in the answer).
If you need to share the data between the users of your application - you need a mysql database server somewhere setup, your application would need to have an access to it. And, the performance can really depend on the network - depends on how heavily would the application use the database. The application itself would only need to know how to "speak" with the database server - python mysql driver, like MySQLdb or pymysql.
If you don't need to share the data between users - then sqlite may be an option. Or may be not - depends on what do you want to store there, what for and what do you need to do with the data.
So, more questions than answers, probably it was more suitable for a comment. At least, think about what I've said.
Also see:
https://stackoverflow.com/questions/1009438/which-database-should-i-use-for-my-desktop-application
Python Desktop Application Database
Python Framework for Desktop Database Application
Hope that helps.

If your application is a stand-alone system such that each user maintains their own private database then you have no alternative to install MySQL on each system that is running the application. You cannot bundle MySQL into your application such that it does not require a separate installation.
There is an embedded version of MySQL that you can build into your application (thanks, Carsten, in the comments, for pointing this out). More information is here: http://mysql-python.blogspot.com/. It may take some effort to get this working (on Windows you apparently need to build it from source code) and will take some more work to get it packaged up when you generate your executable, but this might be a MySQL solution for you.
I've just finished updating a web application using SQLite which had begun reporting Database is locked errors as the usage scaled up. By rewriting the database code with care I was able to produce a system that can handle moderate to heavy usage (in the context of a 15 person company) reliably still using SQLite -- you have to be careful to keep your connections around for the minimum time necessary and always call .close() on them. If your application is really single-user you should have no problem supporting it using SQLite -- and that's doubly true if it's single-threaded.

how to run the python script from the mysql query?

I have a desire to call the python script from the mysql query.
like we call the procedure in mysql : call procedurename();
just like as above is there any way in mysql to call external scripts like ,
call script(somefile.py)
i wrote the above thing to explain the exactly what i want.

This does not seem to be possible in MySQL, for security reasons. You can have a look at this related question Executing shell command from MySQL. You can however do this in other database like oracle. In Postgresql there is also support to create python stored procedures in the database. You could use this technique to have your database triggers run python code.

In python, is there a simple way to connect to a mysql database that doesn't require root access?

I'm writing a script to parse some text files, and insert the data that they contain into a mysql database. I don't have root access on the server that this script will run on. I've been looking at mysql-python, but it requires a bunch of dependencies that I don't have available. Is there a simpler way to do this?

I would recommend the MySQL Python Connector, a MySQL DB-API adapter that does not use the C client library but rather reimplements the MySQL protocol completely in pure Python (compatible with Python 2.5 to 2.7, as well a 3.1).
To install C-coded extensions to Python you generally need root access (though the server you're using might have arranged things differently, that's not all that likely). But with a pure Python solution you can simply upload the modules in question (e.g. those from the Connector I recommend) just as you're uploading those you write yourself, which (if you of course do have a valid userid and password for that MySQL database!-) might solve it for you.