Senthil Kumaran <sent...@uthcode.com> added the comment:

A couple of points to help summarize and to help come to a conclusion.

In the initial message, Stephen pointed out, "it would be desirable to merely 
encode spaces using percent encoding".

It seems to me that only in cases where a custom handling of query string is 
done, would space be encoded to %20 (or if it's an IRI instead of URI - details 
below) and for HTTP requests and in both GET and POST, encoding to space in a 
URI to + is a correct thing to do.

The query part in the URL always needs to follow the 
application/x-www-form-urlencoded format, so even when urlencode is used for 
constructing a query parameters, it should encode space to +

The argument that all characters should be hex encoded (and thereby space 
should be %20), seems to apply if it is an IRI. Look at an interesting 
discussion in this link:
http://stackoverflow.com/questions/5366007/why-does-the-encodings-of-a-url-and-the-query-string-part-differ/5433216#5433216

Only with this point as consideration. I think, sending a parameter for quote 
to use quote or quote_plus may be worthy option to consider (Stephen's point 
#3). 

But I have to add that the existing behavior of replacing space with "+" in 
"URL"s is not breaking anything and in fact is following the rules properly.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13866>
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