Accessing $_GET and $_POST query string or form value equivalents in Python

In PHP, I can retrieve the value in a query string like so:

So, if the request URI is http://example.com/index.php?foo=bar

<?php echo $_GET['foo']; //bar ?>

How can I emulate the above code in Python? (and not using a heavy web framework)

I cannot find simple documentation for the easiest way to do this in Python. Is there a standard Python library for handling incoming HTTP requests? I know Python is not a templating language, but its wide usage on the web suggests there should be a simple 开发者_如何学Pythonway of handling this.

All the web frameworks do it differently. As you say, Python is not a templating language, so there is no automatic way to handle HTTP requests.

There is a cgi module which is part of the standard library, and which you can use to access POSTed data via cgi.FieldStorage() - but serving an app via standard CGI is horribly inefficient and only suitable for very small-scale stuff.

A much better idea is to use a simple WSGI framework (WSGI is the standard for serving web applications with Python). There are quite a few - my current favourite is flask although I hear good things about bottle too.

Your "non heavy web framework" should typically pass a request parameter to you, and you can access the get strings from the request.GET or something to that effect.