Revert last change.
diff --git a/Lib/urlparse.py b/Lib/urlparse.py
index f6b367f..2f1965a 100644
--- a/Lib/urlparse.py
+++ b/Lib/urlparse.py
@@ -8,22 +8,22 @@
"urlsplit", "urlunsplit"]
# A classification of schemes ('' means apply by default)
-uses_relative = set(['ftp', 'http', 'gopher', 'nntp', 'imap',
+uses_relative = ['ftp', 'http', 'gopher', 'nntp', 'imap',
'wais', 'file', 'https', 'shttp', 'mms',
- 'prospero', 'rtsp', 'rtspu', ''])
-uses_netloc = set(['ftp', 'http', 'gopher', 'nntp', 'telnet',
+ 'prospero', 'rtsp', 'rtspu', '']
+uses_netloc = ['ftp', 'http', 'gopher', 'nntp', 'telnet',
'imap', 'wais', 'file', 'mms', 'https', 'shttp',
- 'snews', 'prospero', 'rtsp', 'rtspu', ''])
-non_hierarchical = set(['gopher', 'hdl', 'mailto', 'news',
- 'telnet', 'wais', 'imap', 'snews', 'sip'])
-uses_params = set(['ftp', 'hdl', 'prospero', 'http', 'imap',
+ 'snews', 'prospero', 'rtsp', 'rtspu', '']
+non_hierarchical = ['gopher', 'hdl', 'mailto', 'news',
+ 'telnet', 'wais', 'imap', 'snews', 'sip']
+uses_params = ['ftp', 'hdl', 'prospero', 'http', 'imap',
'https', 'shttp', 'rtsp', 'rtspu', 'sip',
- 'mms', ''])
-uses_query = set(['http', 'wais', 'imap', 'https', 'shttp', 'mms',
- 'gopher', 'rtsp', 'rtspu', 'sip', ''])
-uses_fragment = set(['ftp', 'hdl', 'http', 'gopher', 'news',
+ 'mms', '']
+uses_query = ['http', 'wais', 'imap', 'https', 'shttp', 'mms',
+ 'gopher', 'rtsp', 'rtspu', 'sip', '']
+uses_fragment = ['ftp', 'hdl', 'http', 'gopher', 'news',
'nntp', 'wais', 'https', 'shttp', 'snews',
- 'file', 'prospero', ''])
+ 'file', 'prospero', '']
# Characters valid in scheme names
scheme_chars = ('abcdefghijklmnopqrstuvwxyz'