diff -r 1ebefb6ae9a9 Lib/test/test_urllib2.py
--- a/Lib/test/test_urllib2.py	Tue Mar 26 17:48:28 2013 +0100
+++ b/Lib/test/test_urllib2.py	Tue Mar 26 15:00:15 2013 -0700
@@ -932,6 +932,39 @@
             p_ds_req = h.do_request_(ds_req)
             self.assertEqual(p_ds_req.unredirected_hdrs["Host"],"example.com")
 
+    def test_full_url_setter(self):
+        # Checks to ensure that components are set correctly after setting the
+        # full_url of a Request object
+
+        def assertEqual(parsed, req, orig):
+            self.assertEqual(parsed.scheme, req.type)
+            self.assertEqual(req.full_url, orig)
+            self.assertEqual(req.get_full_url(), orig)
+            self.assertEqual(parsed.netloc, req.origin_req_host)
+            self.assertEqual(parsed.fragment, req.fragment or '')
+            self.assertEqual(parsed.query, req.selector.replace('/?', ''))
+
+        urls = [
+            'http://example.com?foo=bar#baz',
+            'http://example.com?foo=bar&spam=eggs#bash',
+            'http://example.com',
+        ]
+
+        r = Request(urls[0])
+        assertEqual(urllib.parse.urlparse(urls[0]), r, urls[0])
+
+        for url in urls[1:]:
+            parts = urllib.parse.urlparse(url)    
+            r.full_url = url
+            assertEqual(parts, r, url)
+
+    def test_full_url_deleter(self):
+        r = Request('http://www.example.com')
+        del r.full_url
+        self.assertIsNone(r.full_url)
+        self.assertIsNone(r.fragment)
+        self.assertEqual(r.selector, '')
+
     def test_fixpath_in_weirdurls(self):
         # Issue4493: urllib2 to supply '/' when to urls where path does not
         # start with'/'
diff -r 1ebefb6ae9a9 Lib/urllib/request.py
--- a/Lib/urllib/request.py	Tue Mar 26 17:48:28 2013 +0100
+++ b/Lib/urllib/request.py	Tue Mar 26 15:00:15 2013 -0700
@@ -263,9 +263,7 @@
     def __init__(self, url, data=None, headers={},
                  origin_req_host=None, unverifiable=False,
                  method=None):
-        # unwrap('<URL:type://host/path>') --> 'type://host/path'
-        self.full_url = unwrap(url)
-        self.full_url, self.fragment = splittag(self.full_url)
+        self.full_url = url
         self.headers = {}
         self.unredirected_hdrs = {}
         self._data = None
@@ -278,8 +276,27 @@
         self.origin_req_host = origin_req_host
         self.unverifiable = unverifiable
         self.method = method
+
+    @property
+    def full_url(self):
+        if self.fragment:
+            return '%s#%s' % (self._full_url, self.fragment)
+        else:
+            return self._full_url
+
+    @full_url.setter
+    def full_url(self, url):
+        # unwrap('<URL:type://host/path>') --> 'type://host/path'
+        self._full_url = unwrap(url)
+        self._full_url, self.fragment = splittag(self._full_url)
         self._parse()
 
+    @full_url.deleter
+    def full_url(self):
+        self._full_url = None
+        self.fragment = None
+        self.selector = '' 
+
     @property
     def data(self):
         return self._data
@@ -299,7 +316,7 @@
         self.data = None
 
     def _parse(self):
-        self.type, rest = splittype(self.full_url)
+        self.type, rest = splittype(self._full_url)
         if self.type is None:
             raise ValueError("unknown url type: %s" % self.full_url)
         self.host, self.selector = splithost(rest)
@@ -316,10 +333,7 @@
             return "GET"
 
     def get_full_url(self):
-        if self.fragment:
-            return '%s#%s' % (self.full_url, self.fragment)
-        else:
-            return self.full_url
+        return self.full_url
 
     def set_proxy(self, host, type):
         if self.type == 'https' and not self._tunnel_host:
diff -r 1ebefb6ae9a9 Misc/ACKS
--- a/Misc/ACKS	Tue Mar 26 17:48:28 2013 +0100
+++ b/Misc/ACKS	Tue Mar 26 15:00:15 2013 -0700
@@ -153,6 +153,7 @@
 Sven Brauch
 Erik Bray
 Brian Brazil
+Demian Brecht
 Dave Brennan
 Tom Bridgman
 Anthony Briggs