.. index:: single: Internet Config
- In a Macintosh environment, :func:`urlopen` will retrieve proxy information from
- Internet Config.
+ In a Mac OS X environment, :func:`urlopen` will retrieve proxy information
+ from the OS X System Configuration Framework, which can be managed with
+ Network System Preferences panel.
+
Alternatively, the optional *proxies* argument may be used to explicitly specify
proxies. It must be a dictionary mapping scheme names to proxy URLs, where an
default installed global :class:`OpenerDirector` uses :class:`UnknownHandler` to
ensure this never happens).
+ In addition, default installed :class:`ProxyHandler` makes sure the requests
+ are handled through the proxy when they are set.
+
.. versionchanged:: 2.6
*timeout* was added.
.. class:: ProxyHandler([proxies])
Cause requests to go through a proxy. If *proxies* is given, it must be a
- dictionary mapping protocol names to URLs of proxies. The default is to read the
- list of proxies from the environment variables :envvar:`<protocol>_proxy`.
+ dictionary mapping protocol names to URLs of proxies. The default is to read
+ the list of proxies from the environment variables
+ :envvar:`<protocol>_proxy`. If no proxy environment variables are set, in a
+ Windows environment, proxy settings are obtained from the registry's
+ Internet Settings section and in a Mac OS X environment, proxy information
+ is retrieved from from the OS X System Configuration Framework.
+
To disable autodetected proxy pass an empty dictionary.