Python get data from secured website
This is a part of Web-Scraping :

Web-scraping is a standard task that can serve various needs.
Scraping data out of secure-website means https
Handling https is not a problem with mechanize and BeautifulSoup
Although urllib2 with HTTPCookieJar also works fine
If managing the cookies is the problem, then I would recommend mechanize

Considering the case of your BANK-Site :

I would recommend not to play with your account.
If you must then, its not as easy as any normal secure/non-secure site.
These sites are designed to with-stand such scripts.

Problems that you would face with this:

BANK sites will surely have Captcha that is almost impossible to by-pass with a script unless you employee a lot of rocket-science and effort.
Other problem that you will definitely face is javascript, standard scripting solutions are focused to manage cookies, HTML parsing, etc. For processing javascript on links you will have to process js in your python script. That again needs a lot of effort.
Then, AJAX that again comes from javascript fetches data from server after page-load.

So, it will require you to take a lot of effort to do this task.
Also, if you try doing this you risk of blocking access to your account since banking sites are quick to block account access on 3-4 unsuccessful attempt on login or captcha, etc.
So, think before you do.
Id like to know if there is a way to get information from my banking website with Python, Id like to retrieve my card history and display it, and possibly save it into a text document each month.
I have found the urls ext to login and get the information from the website, which works from a browser, but I have been using liburl2 to "open" the webpages from Python and I have a feeling its not working because of some cookie or session things.
I can get any information I want from a website that does not require a login with urllib2, and then save the actual HTML and go through it later, but I cant on my banks website,
Any help would be appreciated