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<h1 id="index">索引 &ndash; U</h1>

<table style="width: 100%" class="indextable"><tr>
  <td style="width: 33%; vertical-align: top;"><ul>
      <li>
    u&#34;

      <ul>
        <li><a href="reference/lexical_analysis.html#index-16">string literal</a>
</li>
      </ul></li>
      <li>
    u&#39;

      <ul>
        <li><a href="reference/lexical_analysis.html#index-16">string literal</a>
</li>
      </ul></li>
      <li><a href="library/aifc.html#index-1">u-LAW</a>, <a href="library/audioop.html#index-0">[1]</a>, <a href="library/sndhdr.html#index-0">[2]</a>
</li>
      <li><a href="library/unicodedata.html#unicodedata.ucd_3_2_0">ucd_3_2_0() (在 unicodedata 模块中)</a>
</li>
      <li><a href="library/select.html#select.kevent.udata">udata (select.kevent 属性)</a>
</li>
      <li><a href="library/socketserver.html#socketserver.UDPServer">UDPServer (socketserver 中的类)</a>
</li>
      <li><a href="library/stat.html#stat.UF_APPEND">UF_APPEND() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_COMPRESSED">UF_COMPRESSED() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_HIDDEN">UF_HIDDEN() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_IMMUTABLE">UF_IMMUTABLE() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_NODUMP">UF_NODUMP() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_NOUNLINK">UF_NOUNLINK() (在 stat 模块中)</a>
</li>
      <li><a href="library/stat.html#stat.UF_OPAQUE">UF_OPAQUE() (在 stat 模块中)</a>
</li>
      <li><a href="library/tarfile.html#tarfile.TarInfo.uid">uid (tarfile.TarInfo 属性)</a>
</li>
      <li><a href="library/imaplib.html#imaplib.IMAP4.uid">uid() (imaplib.IMAP4 方法)</a>
</li>
      <li><a href="library/poplib.html#poplib.POP3.uidl">uidl() (poplib.POP3 方法)</a>
</li>
      <li><a href="library/audioop.html#audioop.ulaw2lin">ulaw2lin() (在 audioop 模块中)</a>
</li>
      <li><a href="c-api/long.html#index-4">ULONG_MAX</a>
</li>
      <li><a href="library/os.html#os.umask">umask() (在 os 模块中)</a>
</li>
      <li><a href="library/pdb.html#pdbcommand-unalias">unalias (pdb command)</a>
</li>
      <li><a href="library/tarfile.html#tarfile.TarInfo.uname">uname (tarfile.TarInfo 属性)</a>
</li>
      <li><a href="library/os.html#os.uname">uname() (在 os 模块中)</a>

      <ul>
        <li><a href="library/platform.html#platform.uname">(在 platform 模块中)</a>
</li>
      </ul></li>
      <li>
    unary

      <ul>
        <li><a href="reference/expressions.html#index-57">arithmetic operation</a>
</li>
        <li><a href="reference/expressions.html#index-57">bitwise operation</a>
</li>
      </ul></li>
      <li><a href="library/dis.html#opcode-UNARY_INVERT">UNARY_INVERT (opcode)</a>
</li>
      <li><a href="library/dis.html#opcode-UNARY_NEGATIVE">UNARY_NEGATIVE (opcode)</a>
</li>
      <li><a href="library/dis.html#opcode-UNARY_NOT">UNARY_NOT (opcode)</a>
</li>
      <li><a href="library/dis.html#opcode-UNARY_POSITIVE">UNARY_POSITIVE (opcode)</a>
</li>
      <li>
    unbinding

      <ul>
        <li><a href="reference/simple_stmts.html#index-22">name</a>
</li>
      </ul></li>
      <li><a href="library/exceptions.html#UnboundLocalError">UnboundLocalError</a>, <a href="reference/executionmodel.html#index-9">[1]</a>
</li>
      <li><a href="library/functions.html#index-7">unbuffered I/O</a>
</li>
      <li>
    UNC paths

      <ul>
        <li><a href="library/os.html#index-19">and os.makedirs()</a>
</li>
      </ul></li>
      <li><a href="library/py_compile.html#py_compile.PycInvalidationMode.UNCHECKED_HASH">UNCHECKED_HASH (py_compile.PycInvalidationMode 属性)</a>
</li>
      <li><a href="library/zlib.html#zlib.Decompress.unconsumed_tail">unconsumed_tail (zlib.Decompress 属性)</a>
</li>
      <li><a href="library/curses.html#curses.unctrl">unctrl() (在 curses 模块中)</a>

      <ul>
        <li><a href="library/curses.ascii.html#curses.ascii.unctrl">(在 curses.ascii 模块中)</a>
</li>
      </ul></li>
      <li><a href="distutils/apiref.html#distutils.ccompiler.CCompiler.undefine_macro">undefine_macro() (distutils.ccompiler.CCompiler 方法)</a>
</li>
      <li><a href="library/decimal.html#decimal.Underflow">Underflow (decimal 中的类)</a>
</li>
      <li><a href="library/pdb.html#pdbcommand-undisplay">undisplay (pdb command)</a>
</li>
      <li><a href="library/turtle.html#turtle.undo">undo() (在 turtle 模块中)</a>
</li>
      <li><a href="library/turtle.html#turtle.undobufferentries">undobufferentries() (在 turtle 模块中)</a>
</li>
      <li><a href="library/cmd.html#cmd.Cmd.undoc_header">undoc_header (cmd.Cmd 属性)</a>
</li>
      <li><a href="library/html.html#html.unescape">unescape() (在 html 模块中)</a>

      <ul>
        <li><a href="library/xml.sax.utils.html#xml.sax.saxutils.unescape">(在 xml.sax.saxutils 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/doctest.html#doctest.UnexpectedException">UnexpectedException</a>
</li>
      <li><a href="library/unittest.html#unittest.TestResult.unexpectedSuccesses">unexpectedSuccesses (unittest.TestResult 属性)</a>
</li>
      <li><a href="library/gc.html#gc.unfreeze">unfreeze() (在 gc 模块中)</a>
</li>
      <li><a href="library/curses.html#curses.unget_wch">unget_wch() (在 curses 模块中)</a>
</li>
      <li><a href="library/curses.html#curses.ungetch">ungetch() (在 curses 模块中)</a>

      <ul>
        <li><a href="library/msvcrt.html#msvcrt.ungetch">(在 msvcrt 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/curses.html#curses.ungetmouse">ungetmouse() (在 curses 模块中)</a>
</li>
      <li><a href="library/msvcrt.html#msvcrt.ungetwch">ungetwch() (在 msvcrt 模块中)</a>
</li>
      <li><a href="library/binascii.html#binascii.unhexlify">unhexlify() (在 binascii 模块中)</a>
</li>
      <li><a href="library/codecs.html#index-0">Unicode</a>, <a href="library/unicodedata.html#index-0">[1]</a>, <a href="reference/datamodel.html#index-19">[2]</a>

      <ul>
        <li><a href="library/unicodedata.html#index-0">database</a>
</li>
      </ul></li>
      <li><a href="library/2to3.html#2to3fixer-unicode">unicode (2to3 fixer)</a>
</li>
      <li><a href="reference/lexical_analysis.html#index-17">Unicode Consortium</a>
</li>
      <li><a href="library/unicodedata.html#module-unicodedata">unicodedata (模块)</a>
</li>
      <li><a href="library/exceptions.html#UnicodeDecodeError">UnicodeDecodeError</a>
</li>
      <li><a href="library/exceptions.html#UnicodeEncodeError">UnicodeEncodeError</a>
</li>
      <li><a href="library/exceptions.html#UnicodeError">UnicodeError</a>
</li>
      <li><a href="library/exceptions.html#UnicodeTranslateError">UnicodeTranslateError</a>
</li>
      <li><a href="library/exceptions.html#UnicodeWarning">UnicodeWarning</a>
</li>
      <li><a href="library/unicodedata.html#unicodedata.unidata_version">unidata_version() (在 unicodedata 模块中)</a>
</li>
      <li><a href="library/difflib.html#difflib.unified_diff">unified_diff() (在 difflib 模块中)</a>
</li>
      <li><a href="library/random.html#random.uniform">uniform() (在 random 模块中)</a>
</li>
      <li><a href="library/http.client.html#http.client.UnimplementedFileMode">UnimplementedFileMode</a>
</li>
      <li><a href="library/ctypes.html#ctypes.Union">Union (ctypes 中的类)</a>
</li>
      <li><a href="library/stdtypes.html#frozenset.union">union() (frozenset 方法)</a>
</li>
      <li><a href="library/typing.html#typing.Union">Union() (在 typing 模块中)</a>
</li>
      <li><a href="library/enum.html#enum.unique">unique() (在 enum 模块中)</a>, <a href="library/enum.html#enum.unique">[1]</a>
</li>
      <li><a href="library/unittest.html#module-unittest">unittest (模块)</a>
</li>
      <li>
    unittest command line option

      <ul>
        <li><a href="library/unittest.html#cmdoption-unittest-b">--buffer</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-c">--catch</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-f">--failfast</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-locals">--locals</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-b">-b</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-c">-c</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-f">-f</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-k">-k</a>
</li>
      </ul></li>
      <li>
    unittest-discover command line option

      <ul>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-p">--pattern pattern</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-s">--start-directory directory</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-t">--top-level-directory directory</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-v">--verbose</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-p">-p</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-s">-s</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-t">-t</a>
</li>
        <li><a href="library/unittest.html#cmdoption-unittest-discover-v">-v</a>
</li>
      </ul></li>
      <li><a href="library/unittest.mock.html#module-unittest.mock">unittest.mock (模块)</a>
</li>
      <li>
    universal newlines

      <ul>
        <li><a href="library/stdtypes.html#index-42">bytearray.splitlines method</a>
</li>
        <li><a href="library/stdtypes.html#index-42">bytes.splitlines method</a>
</li>
        <li><a href="library/csv.html#index-3">csv.reader function</a>
</li>
        <li><a href="library/importlib.html#index-16">importlib.abc.InspectLoader.get_source method</a>
</li>
        <li><a href="library/io.html#index-2">io.IncrementalNewlineDecoder class</a>
</li>
        <li><a href="library/io.html#index-1">io.TextIOWrapper class</a>
</li>
        <li><a href="library/functions.html#index-6">open() built-in function</a>
</li>
        <li><a href="library/stdtypes.html#index-32">str.splitlines method</a>
</li>
        <li><a href="library/subprocess.html#index-1">subprocess module</a>
</li>
        <li><a href="whatsnew/2.3.html#index-8">What&#39;s new</a>, <a href="whatsnew/2.4.html#index-7">[1]</a>, <a href="whatsnew/2.5.html#index-18">[2]</a>, <a href="whatsnew/2.6.html#index-13">[3]</a>
</li>
      </ul></li>
      <li><a href="glossary.html#term-universal-newlines"><strong>universal newlines -- 通用换行</strong></a>
</li>
      <li><a href="reference/toplevel_components.html#index-4">UNIX</a>

      <ul>
        <li><a href="library/fcntl.html#index-0">file control</a>
</li>
        <li><a href="library/fcntl.html#index-0">I/O control</a>
</li>
      </ul></li>
      <li><a href="library/csv.html#csv.unix_dialect">unix_dialect (csv 中的类)</a>
</li>
      <li><a href="library/test.html#test.support.unix_shell">unix_shell() (在 test.support 模块中)</a>
</li>
      <li><a href="library/socketserver.html#socketserver.UnixDatagramServer">UnixDatagramServer (socketserver 中的类)</a>
</li>
      <li><a href="library/socketserver.html#socketserver.UnixStreamServer">UnixStreamServer (socketserver 中的类)</a>
</li>
      <li><a href="library/uuid.html#uuid.SafeUUID.unknown">unknown (uuid.SafeUUID 属性)</a>
</li>
      <li><a href="library/html.parser.html#html.parser.HTMLParser.unknown_decl">unknown_decl() (html.parser.HTMLParser 方法)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.BaseHandler.unknown_open">unknown_open() (urllib.request.BaseHandler 方法)</a>

      <ul>
        <li><a href="library/urllib.request.html#urllib.request.UnknownHandler.unknown_open">(urllib.request.UnknownHandler 方法)</a>
</li>
      </ul></li>
      <li><a href="library/urllib.request.html#urllib.request.UnknownHandler">UnknownHandler (urllib.request 中的类)</a>
</li>
      <li><a href="library/http.client.html#http.client.UnknownProtocol">UnknownProtocol</a>
</li>
      <li><a href="library/http.client.html#http.client.UnknownTransferEncoding">UnknownTransferEncoding</a>
</li>
      <li><a href="library/pathlib.html#pathlib.Path.unlink">unlink() (pathlib.Path 方法)</a>

      <ul>
        <li><a href="library/xml.dom.minidom.html#xml.dom.minidom.Node.unlink">(xml.dom.minidom.Node 方法)</a>
</li>
        <li><a href="library/os.html#os.unlink">(在 os 模块中)</a>
</li>
        <li><a href="library/test.html#test.support.unlink">(在 test.support 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/test.html#test.support.unload">unload() (在 test.support 模块中)</a>
</li>
      <li><a href="library/mailbox.html#mailbox.Babyl.unlock">unlock() (mailbox.Babyl 方法)</a>

      <ul>
        <li><a href="library/mailbox.html#mailbox.Mailbox.unlock">(mailbox.Mailbox 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.Maildir.unlock">(mailbox.Maildir 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.mbox.unlock">(mailbox.mbox 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.MH.unlock">(mailbox.MH 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.MMDF.unlock">(mailbox.MMDF 方法)</a>
</li>
      </ul></li>
      <li><a href="library/struct.html#struct.Struct.unpack">unpack() (struct.Struct 方法)</a>

      <ul>
        <li><a href="library/struct.html#struct.unpack">(在 struct 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/shutil.html#shutil.unpack_archive">unpack_archive() (在 shutil 模块中)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_array">unpack_array() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_bytes">unpack_bytes() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_double">unpack_double() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/dis.html#opcode-UNPACK_EX">UNPACK_EX (opcode)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_farray">unpack_farray() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_float">unpack_float() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_fopaque">unpack_fopaque() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/struct.html#struct.Struct.unpack_from">unpack_from() (struct.Struct 方法)</a>

      <ul>
        <li><a href="library/struct.html#struct.unpack_from">(在 struct 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_fstring">unpack_fstring() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_list">unpack_list() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_opaque">unpack_opaque() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/dis.html#opcode-UNPACK_SEQUENCE">UNPACK_SEQUENCE (opcode)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker.unpack_string">unpack_string() (xdrlib.Unpacker 方法)</a>
</li>
      <li><a href="library/xdrlib.html#xdrlib.Unpacker">Unpacker (xdrlib 中的类)</a>
</li>
      <li>
    unpacking

      <ul>
        <li><a href="reference/expressions.html#index-17">dictionary</a>
</li>
        <li><a href="reference/expressions.html#index-47">in function calls</a>
</li>
        <li><a href="reference/expressions.html#index-88">iterable</a>
</li>
      </ul></li>
      <li><a href="library/xml.sax.handler.html#xml.sax.handler.DTDHandler.unparsedEntityDecl">unparsedEntityDecl() (xml.sax.handler.DTDHandler 方法)</a>
</li>
      <li><a href="library/pyexpat.html#xml.parsers.expat.xmlparser.UnparsedEntityDeclHandler">UnparsedEntityDeclHandler() (xml.parsers.expat.xmlparser 方法)</a>
</li>
      <li><a href="library/pickle.html#pickle.Unpickler">Unpickler (pickle 中的类)</a>
</li>
      <li><a href="library/pickle.html#pickle.UnpicklingError">UnpicklingError</a>
</li>
  </ul></td>
  <td style="width: 33%; vertical-align: top;"><ul>
      <li><a href="library/email.utils.html#email.utils.unquote">unquote() (在 email.utils 模块中)</a>

      <ul>
        <li><a href="library/urllib.parse.html#urllib.parse.unquote">(在 urllib.parse 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/urllib.parse.html#urllib.parse.unquote_plus">unquote_plus() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.unquote_to_bytes">unquote_to_bytes() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="reference/datamodel.html#index-2">unreachable object</a>
</li>
      <li><a href="distutils/apiref.html#distutils.text_file.TextFile.unreadline">unreadline() (distutils.text_file.TextFile 方法)</a>
</li>
      <li><a href="reference/lexical_analysis.html#index-23">unrecognized escape sequence</a>
</li>
      <li><a href="library/select.html#select.devpoll.unregister">unregister() (select.devpoll 方法)</a>

      <ul>
        <li><a href="library/select.html#select.epoll.unregister">(select.epoll 方法)</a>
</li>
        <li><a href="library/select.html#select.poll.unregister">(select.poll 方法)</a>
</li>
        <li><a href="library/selectors.html#selectors.BaseSelector.unregister">(selectors.BaseSelector 方法)</a>
</li>
        <li><a href="library/atexit.html#atexit.unregister">(在 atexit 模块中)</a>
</li>
        <li><a href="library/faulthandler.html#faulthandler.unregister">(在 faulthandler 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/shutil.html#shutil.unregister_archive_format">unregister_archive_format() (在 shutil 模块中)</a>
</li>
      <li><a href="library/csv.html#csv.unregister_dialect">unregister_dialect() (在 csv 模块中)</a>
</li>
      <li><a href="library/shutil.html#shutil.unregister_unpack_format">unregister_unpack_format() (在 shutil 模块中)</a>
</li>
      <li><a href="library/uuid.html#uuid.SafeUUID.unsafe">unsafe (uuid.SafeUUID 属性)</a>
</li>
      <li><a href="library/test.html#test.support.EnvironmentVarGuard.unset">unset() (test.support.EnvironmentVarGuard 方法)</a>
</li>
      <li><a href="library/os.html#os.unsetenv">unsetenv() (在 os 模块中)</a>
</li>
      <li><a href="library/email.headerregistry.html#email.headerregistry.UnstructuredHeader">UnstructuredHeader (email.headerregistry 中的类)</a>
</li>
      <li><a href="library/imaplib.html#imaplib.IMAP4.unsubscribe">unsubscribe() (imaplib.IMAP4 方法)</a>
</li>
      <li><a href="library/io.html#io.UnsupportedOperation">UnsupportedOperation</a>
</li>
      <li><a href="library/pdb.html#pdbcommand-until">until (pdb command)</a>
</li>
      <li><a href="library/tokenize.html#tokenize.untokenize">untokenize() (在 tokenize 模块中)</a>
</li>
      <li><a href="library/curses.html#curses.window.untouchwin">untouchwin() (curses.window 方法)</a>
</li>
      <li><a href="library/bz2.html#bz2.BZ2Decompressor.unused_data">unused_data (bz2.BZ2Decompressor 属性)</a>

      <ul>
        <li><a href="library/lzma.html#lzma.LZMADecompressor.unused_data">(lzma.LZMADecompressor 属性)</a>
</li>
        <li><a href="library/zlib.html#zlib.Decompress.unused_data">(zlib.Decompress 属性)</a>
</li>
      </ul></li>
      <li><a href="library/urllib.request.html#urllib.request.Request.unverifiable">unverifiable (urllib.request.Request 属性)</a>
</li>
      <li><a href="library/ssl.html#ssl.SSLSocket.unwrap">unwrap() (ssl.SSLSocket 方法)</a>

      <ul>
        <li><a href="library/inspect.html#inspect.unwrap">(在 inspect 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/pdb.html#pdbcommand-up">up (pdb command)</a>
</li>
      <li><a href="library/turtle.html#turtle.up">up() (在 turtle 模块中)</a>
</li>
      <li><a href="library/collections.html#collections.Counter.update">update() (collections.Counter 方法)</a>

      <ul>
        <li><a href="library/stdtypes.html#dict.update">(dict 方法)</a>
</li>
        <li><a href="library/stdtypes.html#frozenset.update">(frozenset 方法)</a>
</li>
        <li><a href="library/hashlib.html#hashlib.hash.update">(hashlib.hash 方法)</a>
</li>
        <li><a href="library/hmac.html#hmac.HMAC.update">(hmac.HMAC 方法)</a>
</li>
        <li><a href="library/http.cookies.html#http.cookies.Morsel.update">(http.cookies.Morsel 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.Mailbox.update">(mailbox.Mailbox 方法)</a>
</li>
        <li><a href="library/mailbox.html#mailbox.Maildir.update">(mailbox.Maildir 方法)</a>
</li>
        <li><a href="library/trace.html#trace.CoverageResults.update">(trace.CoverageResults 方法)</a>
</li>
        <li><a href="library/turtle.html#turtle.update">(在 turtle 模块中)</a>
</li>
      </ul></li>
      <li><a href="library/urllib.request.html#urllib.request.HTTPPasswordMgrWithPriorAuth.update_authenticated">update_authenticated() (urllib.request.HTTPPasswordMgrWithPriorAuth 方法)</a>
</li>
      <li><a href="library/curses.html#curses.update_lines_cols">update_lines_cols() (在 curses 模块中)</a>
</li>
      <li><a href="library/curses.panel.html#curses.panel.update_panels">update_panels() (在 curses.panel 模块中)</a>
</li>
      <li><a href="library/mailbox.html#mailbox.BabylMessage.update_visible">update_visible() (mailbox.BabylMessage 方法)</a>
</li>
      <li><a href="library/functools.html#functools.update_wrapper">update_wrapper() (在 functools 模块中)</a>
</li>
      <li><a href="library/stdtypes.html#bytearray.upper">upper() (bytearray 方法)</a>

      <ul>
        <li><a href="library/stdtypes.html#bytes.upper">(bytes 方法)</a>
</li>
        <li><a href="library/stdtypes.html#str.upper">(str 方法)</a>
</li>
      </ul></li>
      <li><a href="library/os.html#os.urandom">urandom() (在 os 模块中)</a>
</li>
      <li><a href="library/cgi.html#index-0">URL</a>, <a href="library/http.server.html#index-0">[1]</a>, <a href="library/urllib.parse.html#index-0">[2]</a>, <a href="library/urllib.robotparser.html#index-0">[3]</a>

      <ul>
        <li><a href="library/urllib.parse.html#index-0">parsing</a>
</li>
        <li><a href="library/urllib.parse.html#index-0">relative</a>
</li>
      </ul></li>
      <li><a href="library/xmlrpc.client.html#xmlrpc.client.ProtocolError.url">url (xmlrpc.client.ProtocolError 属性)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.url2pathname">url2pathname() (在 urllib.request 模块中)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.urlcleanup">urlcleanup() (在 urllib.request 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urldefrag">urldefrag() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urlencode">urlencode() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.error.html#urllib.error.URLError">URLError</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urljoin">urljoin() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/2to3.html#2to3fixer-urllib">urllib (2to3 fixer)</a>

      <ul>
        <li><a href="library/urllib.html#module-urllib">(模块)</a>
</li>
      </ul></li>
      <li><a href="library/urllib.error.html#module-urllib.error">urllib.error (模块)</a>
</li>
      <li><a href="library/urllib.parse.html#module-urllib.parse">urllib.parse (模块)</a>
</li>
      <li>
    urllib.request

      <ul>
        <li><a href="library/http.client.html#index-1">模块</a>
</li>
      </ul></li>
      <li><a href="library/urllib.request.html#module-urllib.request">urllib.request (模块)</a>
</li>
      <li><a href="library/urllib.request.html#module-urllib.response">urllib.response (模块)</a>
</li>
      <li><a href="library/urllib.robotparser.html#module-urllib.robotparser">urllib.robotparser (模块)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.urlopen">urlopen() (在 urllib.request 模块中)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.URLopener">URLopener (urllib.request 中的类)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urlparse">urlparse() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.request.html#urllib.request.urlretrieve">urlretrieve() (在 urllib.request 模块中)</a>
</li>
      <li><a href="library/base64.html#base64.urlsafe_b64decode">urlsafe_b64decode() (在 base64 模块中)</a>
</li>
      <li><a href="library/base64.html#base64.urlsafe_b64encode">urlsafe_b64encode() (在 base64 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urlsplit">urlsplit() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urlunparse">urlunparse() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/urllib.parse.html#urllib.parse.urlunsplit">urlunsplit() (在 urllib.parse 模块中)</a>
</li>
      <li><a href="library/uuid.html#uuid.UUID.urn">urn (uuid.UUID 属性)</a>
</li>
      <li><a href="library/curses.html#curses.use_default_colors">use_default_colors() (在 curses 模块中)</a>
</li>
      <li><a href="library/curses.html#curses.use_env">use_env() (在 curses 模块中)</a>
</li>
      <li><a href="library/cmd.html#cmd.Cmd.use_rawinput">use_rawinput (cmd.Cmd 属性)</a>
</li>
      <li><a href="library/pyexpat.html#xml.parsers.expat.xmlparser.UseForeignDTD">UseForeignDTD() (xml.parsers.expat.xmlparser 方法)</a>
</li>
      <li><a href="library/getpass.html#index-9">USER</a>
</li>
      <li>
    user

      <ul>
        <li><a href="library/os.html#index-0">effective id</a>
</li>
        <li><a href="library/os.html#index-8">id</a>
</li>
        <li><a href="library/os.html#index-11">id, setting</a>
</li>
      </ul></li>
      <li><a href="library/poplib.html#poplib.POP3.user">user() (poplib.POP3 方法)</a>
</li>
      <li>
    user-defined

      <ul>
        <li><a href="reference/datamodel.html#index-33">function</a>
</li>
        <li><a href="reference/expressions.html#index-50">function call</a>
</li>
        <li><a href="reference/datamodel.html#index-35">method</a>
</li>
      </ul></li>
      <li>
    user-defined function

      <ul>
        <li><a href="reference/compound_stmts.html#index-19">对象</a>, <a href="reference/datamodel.html#index-33">[1]</a>, <a href="reference/expressions.html#index-50">[2]</a>
</li>
      </ul></li>
      <li>
    user-defined method

      <ul>
        <li><a href="reference/datamodel.html#index-35">对象</a>
</li>
      </ul></li>
      <li><a href="whatsnew/2.7.html#index-9">USER_BASE</a>
</li>
      <li><a href="library/site.html#site.USER_BASE">USER_BASE() (在 site 模块中)</a>
</li>
      <li><a href="library/bdb.html#bdb.Bdb.user_call">user_call() (bdb.Bdb 方法)</a>
</li>
      <li><a href="library/bdb.html#bdb.Bdb.user_exception">user_exception() (bdb.Bdb 方法)</a>
</li>
      <li><a href="library/bdb.html#bdb.Bdb.user_line">user_line() (bdb.Bdb 方法)</a>
</li>
      <li><a href="library/bdb.html#bdb.Bdb.user_return">user_return() (bdb.Bdb 方法)</a>
</li>
      <li><a href="library/site.html#site.USER_SITE">USER_SITE() (在 site 模块中)</a>
</li>
      <li>
    usercustomize

      <ul>
        <li><a href="library/site.html#index-5">模块</a>
</li>
      </ul></li>
      <li><a href="library/collections.html#collections.UserDict">UserDict (collections 中的类)</a>
</li>
      <li><a href="library/collections.html#collections.UserList">UserList (collections 中的类)</a>
</li>
      <li><a href="library/getpass.html#index-11">USERNAME</a>, <a href="library/os.html#index-59">[1]</a>
</li>
      <li><a href="library/email.headerregistry.html#email.headerregistry.Address.username">username (email.headerregistry.Address 属性)</a>
</li>
      <li><a href="install/index.html#index-6">USERPROFILE</a>, <a href="library/os.path.html#index-16">[1]</a>
</li>
      <li><a href="library/curses.panel.html#curses.panel.Panel.userptr">userptr() (curses.panel.Panel 方法)</a>
</li>
      <li><a href="library/collections.html#collections.UserString">UserString (collections 中的类)</a>
</li>
      <li><a href="library/exceptions.html#UserWarning">UserWarning</a>
</li>
      <li><a href="library/tarfile.html#tarfile.USTAR_FORMAT">USTAR_FORMAT() (在 tarfile 模块中)</a>
</li>
      <li><a href="library/time.html#index-4">UTC</a>
</li>
      <li><a href="library/datetime.html#datetime.timezone.utc">utc (datetime.timezone 属性)</a>
</li>
      <li><a href="library/datetime.html#datetime.datetime.utcfromtimestamp">utcfromtimestamp() (datetime.datetime 类方法)</a>
</li>
      <li><a href="library/datetime.html#datetime.datetime.utcnow">utcnow() (datetime.datetime 类方法)</a>
</li>
      <li><a href="library/datetime.html#datetime.datetime.utcoffset">utcoffset() (datetime.datetime 方法)</a>

      <ul>
        <li><a href="library/datetime.html#datetime.time.utcoffset">(datetime.time 方法)</a>
</li>
        <li><a href="library/datetime.html#datetime.timezone.utcoffset">(datetime.timezone 方法)</a>
</li>
        <li><a href="library/datetime.html#datetime.tzinfo.utcoffset">(datetime.tzinfo 方法)</a>
</li>
      </ul></li>
      <li><a href="library/datetime.html#datetime.datetime.utctimetuple">utctimetuple() (datetime.datetime 方法)</a>
</li>
      <li><a href="library/email.policy.html#email.policy.EmailPolicy.utf8">utf8 (email.policy.EmailPolicy 属性)</a>
</li>
      <li><a href="library/poplib.html#poplib.POP3.utf8">utf8() (poplib.POP3 方法)</a>
</li>
      <li><a href="library/imaplib.html#imaplib.IMAP4.utf8_enabled">utf8_enabled (imaplib.IMAP4 属性)</a>
</li>
      <li><a href="library/os.html#os.utime">utime() (在 os 模块中)</a>
</li>
      <li>
    uu

      <ul>
        <li><a href="library/binascii.html#index-0">模块</a>
</li>
      </ul></li>
      <li><a href="library/uu.html#module-uu">uu (模块)</a>
</li>
      <li><a href="library/uuid.html#uuid.UUID">UUID (uuid 中的类)</a>
</li>
      <li><a href="library/uuid.html#module-uuid">uuid (模块)</a>
</li>
      <li><a href="library/uuid.html#index-6">uuid1</a>
</li>
      <li><a href="library/uuid.html#uuid.uuid1">uuid1() (在 uuid 模块中)</a>
</li>
      <li><a href="library/uuid.html#index-7">uuid3</a>
</li>
      <li><a href="library/uuid.html#uuid.uuid3">uuid3() (在 uuid 模块中)</a>
</li>
      <li><a href="library/uuid.html#index-8">uuid4</a>
</li>
      <li><a href="library/uuid.html#uuid.uuid4">uuid4() (在 uuid 模块中)</a>
</li>
      <li><a href="library/uuid.html#index-9">uuid5</a>
</li>
      <li><a href="library/uuid.html#uuid.uuid5">uuid5() (在 uuid 模块中)</a>
</li>
      <li><a href="library/msilib.html#msilib.UuidCreate">UuidCreate() (在 msilib 模块中)</a>
</li>
  </ul></td>
</tr></table>


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