Python in a Nutshell

Name

build_opener

Synopsis

build_opener(*handlers)

Creates and returns an instance of class OpenerDirector, covered later in this chapter, with the given handlers. Each handler can be a subclass of class BaseHandler, instantiable without arguments, or an instance of such a subclass, however instantiated. build_opener adds instances of various handler classes provided by module urllib2 in front of the handlers you specify, to handle proxies, unknown schemes, the http, file, and https schemes, HTTP errors, and HTTP redirects. However, if you have instances or subclasses of said classes in handlers, this indicates that you want to override these defaults.