I am working on a small project where I have to submit a form to a website.
The website is, however, using `onclick` event to submit the form (using javascript). 

1. How can the `onclick` event be simulated in python?
2. Which modules can be used? I have heard about `selenium` and `mechanize` modules. But, which module can be used or in case of both, which one is better?

I am new to web scraping and automation.So,it would be very helpful.

Thanks in advance.