| 
      
  u-LAW, [1], [2]
  ucd_3_2_0 (in module unicodedata)
  udata (select.kevent attribute)
  UDPServer (class in socketserver)
  UF_APPEND (in module stat)
  UF_COMPRESSED (in module stat)
  UF_HIDDEN (in module stat)
  UF_IMMUTABLE (in module stat)
  UF_NODUMP (in module stat)
  UF_NOUNLINK (in module stat)
  UF_OPAQUE (in module stat)
  uid (tarfile.TarInfo attribute)
  uid() (imaplib.IMAP4 method)
  uidl() (poplib.POP3 method)
  ulaw2lin() (in module audioop)
  ULONG_MAX
  umask() (in module os)
  unalias (pdb command)
  uname (tarfile.TarInfo attribute)
  uname() (in module os)
  
        
  (in module platform)
  
    unary
  
        
  arithmetic operation
  bitwise operation
  UNARY_INVERT (opcode)
  UNARY_NEGATIVE (opcode)
  UNARY_NOT (opcode)
  UNARY_POSITIVE (opcode)
  
    unbinding
  
        
  name
  UnboundLocalError, [1]
  unbuffered I/O
  
    UNC paths
  
        
  and os.makedirs()
  unconsumed_tail (zlib.Decompress attribute)
  unctrl() (in module curses)
  
        
  (in module curses.ascii)
  undefine_macro() (distutils.ccompiler.CCompiler method)
  Underflow (class in decimal)
  undisplay (pdb command)
  undo() (in module turtle)
  undobufferentries() (in module turtle)
  undoc_header (cmd.Cmd attribute)
  unescape() (in module html)
  
        
  (in module xml.sax.saxutils)
  UnexpectedException
  unexpectedSuccesses (unittest.TestResult attribute)
  unget_wch() (in module curses)
  ungetch() (in module curses)
  
        
  (in module msvcrt)
  ungetmouse() (in module curses)
  ungetwch() (in module msvcrt)
  unhexlify() (in module binascii)
  Unicode, [1], [2]
  
        
  database
  unicode (2to3 fixer)
  Unicode Consortium
  unicodedata (module)
  UnicodeDecodeError
  UnicodeEncodeError
  UnicodeError
  UnicodeTranslateError
  UnicodeWarning
  unidata_version (in module unicodedata)
  unified_diff() (in module difflib)
  uniform() (in module random)
  UnimplementedFileMode
  Union (class in ctypes)
  
        
  (class in typing)
  union() (set method)
  unique() (in module enum), [1]
  unittest (module)
  
    unittest command line option
  
        
  --locals
  -b, --buffer
  -c, --catch
  -f, --failfast
  
    unittest-discover command line option
  
        
  -p, --pattern pattern
  -s, --start-directory directory
  -t, --top-level-directory directory
  -v, --verbose
  unittest.mock (module)
  universal newlines
  
        
  What's new, [1], [2], [3]
  bytearray.splitlines method
  bytes.splitlines method
  csv.reader function
  importlib.abc.InspectLoader.get_source method
  io.IncrementalNewlineDecoder class
  io.TextIOWrapper class
  open() built-in function
  str.splitlines method
  subprocess module
  zipfile.ZipFile.open method
  UNIX
  
        
  I/O control
  file control
  unix_dialect (class in csv)
  UnixDatagramServer (class in socketserver)
  UnixStreamServer (class in socketserver)
  unknown_decl() (html.parser.HTMLParser method)
  unknown_open() (urllib.request.BaseHandler method)
  
        
  (urllib.request.UnknownHandler method)
  UnknownHandler (class in urllib.request)
  UnknownProtocol
  UnknownTransferEncoding
  unlink() (in module os)
  
        
  (pathlib.Path method)
  (xml.dom.minidom.Node method)
  unlock() (mailbox.Babyl method)
  
        
  (mailbox.MH method)
  (mailbox.MMDF method)
  (mailbox.Mailbox method)
  (mailbox.Maildir method)
  (mailbox.mbox method)
  unpack() (in module struct)
  
        
  (struct.Struct method)
  unpack_archive() (in module shutil)
  unpack_array() (xdrlib.Unpacker method)
  unpack_bytes() (xdrlib.Unpacker method)
  unpack_double() (xdrlib.Unpacker method)
  UNPACK_EX (opcode)
  unpack_farray() (xdrlib.Unpacker method)
  unpack_float() (xdrlib.Unpacker method)
  unpack_fopaque() (xdrlib.Unpacker method)
  unpack_from() (in module struct)
  
        
  (struct.Struct method)
  unpack_fstring() (xdrlib.Unpacker method)
  unpack_list() (xdrlib.Unpacker method)
  unpack_opaque() (xdrlib.Unpacker method)
  UNPACK_SEQUENCE (opcode)
  unpack_string() (xdrlib.Unpacker method)
  Unpacker (class in xdrlib)
  
    unpacking
  
        
  dictionary
  in function calls
  iterable
  unparsedEntityDecl() (xml.sax.handler.DTDHandler method)
  UnparsedEntityDeclHandler() (xml.parsers.expat.xmlparser method)
  Unpickler (class in pickle)
  UnpicklingError
  unquote() (in module email.utils)
  
        
  (in module urllib.parse)
  unquote_plus() (in module urllib.parse)
  unquote_to_bytes() (in module urllib.parse)
  unreachable object
   | 
      
  unreadline() (distutils.text_file.TextFile method)
  unrecognized escape sequence
  unregister() (in module atexit)
  
        
  (in module faulthandler)
  (select.devpoll method)
  (select.epoll method)
  (select.poll method)
  (selectors.BaseSelector method)
  unregister_archive_format() (in module shutil)
  unregister_dialect() (in module csv)
  unregister_unpack_format() (in module shutil)
  unset() (test.support.EnvironmentVarGuard method)
  unsetenv() (in module os)
  UnstructuredHeader (class in email.headerregistry)
  unsubscribe() (imaplib.IMAP4 method)
  UnsupportedOperation
  until (pdb command)
  untokenize() (in module tokenize)
  untouchwin() (curses.window method)
  unused_data (bz2.BZ2Decompressor attribute)
  
        
  (lzma.LZMADecompressor attribute)
  (zlib.Decompress attribute)
  unverifiable (urllib.request.Request attribute)
  unwrap() (in module inspect)
  
        
  (ssl.SSLSocket method)
  up (pdb command)
  up() (in module turtle)
  update() (collections.Counter method)
  
        
  (dict method)
  (hashlib.hash method)
  (hmac.HMAC method)
  (http.cookies.Morsel method)
  (in module turtle)
  (mailbox.Mailbox method)
  (mailbox.Maildir method)
  (set method)
  (trace.CoverageResults method)
  update_authenticated() (urllib.request.HTTPPasswordMgrWithPriorAuth method)
  update_lines_cols() (in module curses)
  update_panels() (in module curses.panel)
  update_visible() (mailbox.BabylMessage method)
  update_wrapper() (in module functools)
  upper() (bytearray method)
  
        
  (bytes method)
  (str method)
  urandom() (in module os)
  URL, [1], [2], [3]
  
        
  parsing
  relative
  url (xmlrpc.client.ProtocolError attribute)
  url2pathname() (in module urllib.request)
  urlcleanup() (in module urllib.request)
  urldefrag() (in module urllib.parse)
  urlencode() (in module urllib.parse)
  URLError
  urljoin() (in module urllib.parse)
  urllib (2to3 fixer)
  
        
  (module)
  urllib.error (module)
  urllib.parse (module)
  
    urllib.request
  
        
  module
  urllib.request (module)
  urllib.response (module)
  urllib.robotparser (module)
  urlopen() (in module urllib.request)
  URLopener (class in urllib.request)
  urlparse() (in module urllib.parse)
  urlretrieve() (in module urllib.request)
  urlsafe_b64decode() (in module base64)
  urlsafe_b64encode() (in module base64)
  urlsplit() (in module urllib.parse)
  urlunparse() (in module urllib.parse)
  urlunsplit() (in module urllib.parse)
  urn (uuid.UUID attribute)
  use_default_colors() (in module curses)
  use_env() (in module curses)
  use_rawinput (cmd.Cmd attribute)
  UseForeignDTD() (xml.parsers.expat.xmlparser method)
  USER
  
    user
  
        
  effective id
  id
  id, setting
  user() (poplib.POP3 method)
  
    user-defined
  
        
  function
  function call
  method
  
    user-defined function
  
        
  object, [1], [2]
  
    user-defined method
  
        
  object
  USER_BASE
  
        
  (in module site)
  user_call() (bdb.Bdb method)
  user_exception() (bdb.Bdb method)
  user_line() (bdb.Bdb method)
  user_return() (bdb.Bdb method)
  USER_SITE (in module site)
  
    usercustomize
  
        
  module
  UserDict (class in collections)
  UserList (class in collections)
  USERNAME, [1]
  username (email.headerregistry.Address attribute)
  USERPROFILE, [1]
  userptr() (curses.panel.Panel method)
  UserString (class in collections)
  UserWarning
  USTAR_FORMAT (in module tarfile)
  UTC
  utc (datetime.timezone attribute)
  utcfromtimestamp() (datetime.datetime class method)
  utcnow() (datetime.datetime class method)
  utcoffset() (datetime.datetime method)
  
        
  (datetime.time method)
  (datetime.timezone method)
  (datetime.tzinfo method)
  utctimetuple() (datetime.datetime method)
  utf8 (email.policy.EmailPolicy attribute)
  utf8() (poplib.POP3 method)
  utf8_enabled (imaplib.IMAP4 attribute)
  utime() (in module os)
  
    uu
  
        
  module
  uu (module)
  UUID (class in uuid)
  uuid (module)
  uuid1
  uuid1() (in module uuid)
  uuid3
  uuid3() (in module uuid)
  uuid4
  uuid4() (in module uuid)
  uuid5
  uuid5() (in module uuid)
  UuidCreate() (in module msilib)
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