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Re: Help on instance of closeable_response in module Mechanize

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  Re: Help on instance of closeable_response in module Mechanize Chris Rebert <crebert@ucsd.edu> - 2011-08-22 17:27 -0700

#12057 — Re: Help on instance of closeable_response in module Mechanize

On Mon, Aug 22, 2011 at 5:17 PM, Yingjie Lin <Yingjie.Lin@mssm.edu> wrote:
> Hi Python users,
>
> I have a question about the instance of closeable_response in module Mechanize.
>
>        from mechanize import ParseResponse, urlopen
>        url = "http://wwwsearch.sourceforge.net/mechanize/example.html"
>        r = urlopen(url)
>        forms = ParseResponse(r, backwards_compat=False)
>        html_lines = r.read()
>
> If I call ParseResponse() before r.read(), then lforms would be a list containing one form
> instance, and html_lines would be an empty string. If I call r.read() first, then html_lines
> would be the HTML source code of the page, but forms would be an empty list.
>
> Therefore, I have to open the url twice, once for each function, like this:
>
>        r = urlopen(url)
>        forms = ParseResponse(r, backwards_compat=False)
>        r = urlopen(url)
>        html_lines = r.read()
>
> I believe this shouldn't be necessary. What is the proper way of doing it? Thank you.

Untested speculation:

from StringIO import StringIO
r = urlopen(url)
html = r.read()
s = StringIO(html)
forms = ParseResponse(s, backwards_compat=False)

Cheers,
Chris

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