Python mechanize, following link by url and what is the nr parameter?
br.follow_link takes either a Link object or a keyword arg (such as nr=0).
br.links() lists all the links.
br.links(url_regex='...') lists all the links whose urls matches the regex.
br.links(text_regex='...') lists all the links whose link text matches the regex.
br.follow_link(nr=num) follows the numth link on the page, with counting starting at 0. It returns a response object (the same kind what br.open(...) returns)
br.find_link(url='...') returns the Link object whose url exactly equals the given url.
br.find_link, br.links, br.follow_link, br.click_link all accept the same keywords. Run help(br.find_link) to see documentation on those keywords.
Edit: If you have a target url that you wish to follow, you could do something like this:
import mechanizebr = mechanize.Browser()response=br.open("http://www.example.com/")target_url='http://www.rfc-editor.org/rfc/rfc2606.txt'for link in br.links(): print(link) # Link(base_url='http://www.example.com/', url='http://www.rfc-editor.org/rfc/rfc2606.txt', text='RFC 2606', tag='a', attrs=[('href', 'http://www.rfc-editor.org/rfc/rfc2606.txt')]) print(link.url) # http://www.rfc-editor.org/rfc/rfc2606.txt if link.url == target_url: print('match found') # match found breakbr.follow_link(link) # link still holds the last value it had in the loopprint(br.geturl())# http://www.rfc-editor.org/rfc/rfc2606.txt
I found this way to do it, for reference for anyone who doesn't want to use regex:
r = br.open("http://www.somewebsite.com")br.find_link(url='http://www.somewebsite.com/link1.html')req = br.click_link(url='http://www.somewebsite.com/link1.html')br.open(req)print br.response().read()Or, it will work by the link's text also:
r = br.open("http://www.somewebsite.com")br.find_link(text='Click this link')req = br.click_link(text='Click this link')br.open(req)print br.response().read()