about downloading the selected information

[woaibeiyang]

I have a problem to download the information from url
http://www.ncbi.nlm.nih.gov/sites/entrez. Because it is impossible for me to
add searching material to the url to construct a new url and then visit the
website.
I have the searching material, however I could not find the way to deal with
this problem. I want to know how can I do this problem with python and which
part of knowledge should I view first? Thanks!

 

[Gabriel Genellina]

I have a problem to download the information from url
http://www.ncbi.nlm.nih.gov/sites/entrez. Because it is impossible for me to
add searching material to the url to construct a new url and then visit the
website.
I have the searching material, however I could not find the way to deal with
this problem. I want to know how can I do this problem with python and which
part of knowledge should I view first? Thanks!

Use an HTTP tracer (or logger, or sniffer...) to see the request that the browser sends to the server. Then analyze the page source to figure out how the different options modify the request sent.

 

[woaibeiyang]

Thanks a lot!