see the \function{urlencode()} function below.
The \function{urlopen()} function works transparently with proxies
-whicd do not require authentication. In a \UNIX{} or Windows
+which do not require authentication. In a \UNIX{} or Windows
environment, set the \envvar{http_proxy}, \envvar{ftp_proxy} or
\envvar{gopher_proxy} environment variables to a URL that identifies
the proxy server before starting the Python interpreter. For example
no easy way to extract it. If the returned data is HTML, you can use
the module \refmodule{htmllib}\refstmodindex{htmllib} to parse it.
+\item
+This module does not support the use of proxies which require
+authentication. This may be implemented in the future.
+
\item
Although the \module{urllib} module contains (undocumented) routines
to parse and unparse URL strings, the recommended interface for URL