- O_APPEND (in module os)
 
    - O_ASYNC (in module os)
 
    - O_BINARY (in module os)
 
    - O_CLOEXEC (in module os)
 
    - O_CREAT (in module os)
 
    - O_DIRECT (in module os)
 
    - O_DIRECTORY (in module os)
 
    - O_DSYNC (in module os)
 
    - O_EXCL (in module os)
 
    - O_EXLOCK (in module os)
 
    - O_NDELAY (in module os)
 
    - O_NOATIME (in module os)
 
    - O_NOCTTY (in module os)
 
    - O_NOFOLLOW (in module os)
 
    - O_NOINHERIT (in module os)
 
    - O_NONBLOCK (in module os)
 
    - O_RANDOM (in module os)
 
    - O_RDONLY (in module os)
 
    - O_RDWR (in module os)
 
    - O_RSYNC (in module os)
 
    - O_SEQUENTIAL (in module os)
 
    - O_SHLOCK (in module os)
 
    - O_SHORT_LIVED (in module os)
 
    - O_SYNC (in module os)
 
    - O_TEMPORARY (in module os)
 
    - O_TEXT (in module os)
 
    - O_TRUNC (in module os)
 
    - O_WRONLY (in module os)
 
    - obj (memoryview attribute)
 
    - object, [1]
 
    
      - Boolean, [1]
 
      - Capsule
 
      - Ellipsis
 
      - None, [1], [2]
 
      - NotImplemented
 
      - built-in function, [1]
 
      - built-in method, [1]
 
      - bytearray, [1], [2], [3]
 
      - bytes, [1], [2]
 
      - callable, [1]
 
      - class, [1], [2]
 
      - class instance, [1], [2]
 
      - code, [1], [2], [3]
 
      - complex
 
      - complex number, [1]
 
      - deallocation
 
      - dictionary, [1], [2], [3], [4], [5], [6], [7]
 
      - file, [1], [2]
 
      - finalization
 
      - floating point, [1], [2]
 
      - frame
 
      - frozenset, [1]
 
      - function, [1], [2], [3], [4], [5]
 
      - generator, [1], [2]
 
      - immutable, [1], [2]
 
      - immutable sequence
 
      - instance, [1], [2]
 
      - instancemethod
 
      - integer, [1], [2]
 
      - io.StringIO
 
      - list, [1], [2], [3], [4], [5], [6], [7], [8]
 
      - long integer
 
      - mapping, [1], [2], [3], [4], [5]
 
      - memoryview, [1]
 
      - method, [1], [2], [3], [4], [5]
 
      - module, [1], [2]
 
      - mutable, [1], [2]
 
      - mutable sequence
 
      - numeric, [1], [2], [3], [4]
 
      - range
 
      - sequence, [1], [2], [3], [4], [5], [6], [7], [8]
 
      - set, [1], [2], [3]
 
      - set type
 
      - slice
 
      - socket
 
      - string, [1], [2]
 
      - traceback, [1], [2], [3], [4]
 
      - tuple, [1], [2], [3], [4], [5], [6]
 
      - type, [1], [2]
 
      - user-defined function, [1], [2]
 
      - user-defined method
 
    
    - object (UnicodeError attribute)
 
    - object() (built-in function)
 
    - object.__slots__ (built-in variable)
 
    - object_filenames() (distutils.ccompiler.CCompiler method)
 
    - objects
 
    
      - comparing
 
      - flattening
 
      - marshalling
 
      - persistent
 
      - pickling
 
      - serializing
 
    
    - obufcount() (ossaudiodev.oss_audio_device method)
 
    - obuffree() (ossaudiodev.oss_audio_device method)
 
    - oct() (built-in function)
 
    - octal
 
    
      - literals
 
    
    - octal literal
 
    - octdigits (in module string)
 
    - offset (xml.parsers.expat.ExpatError attribute)
 
    - OK (in module curses)
 
    - OleDLL (class in ctypes)
 
    - onclick() (in module turtle), [1]
 
    - ondrag() (in module turtle)
 
    - onecmd() (cmd.Cmd method)
 
    - onkey() (in module turtle)
 
    - onkeypress() (in module turtle)
 
    - onkeyrelease() (in module turtle)
 
    - onrelease() (in module turtle)
 
    - onscreenclick() (in module turtle)
 
    - ontimer() (in module turtle)
 
    - OP (in module token)
 
    - OP_ALL (in module ssl)
 
    - OP_CIPHER_SERVER_PREFERENCE (in module ssl)
 
    - OP_NO_COMPRESSION (in module ssl)
 
    - OP_NO_SSLv2 (in module ssl)
 
    - OP_NO_SSLv3 (in module ssl)
 
    - OP_NO_TLSv1 (in module ssl)
 
    - OP_SINGLE_DH_USE (in module ssl)
 
    - OP_SINGLE_ECDH_USE (in module ssl)
 
    - open
 
    
      - built-in function, [1]
 
    
    - open() (built-in function)
 
    
      - (distutils.text_file.TextFile method)
 
      - (imaplib.IMAP4 method)
 
      - (in module aifc)
 
      - (in module bz2)
 
      - (in module codecs)
 
      - (in module dbm)
 
      - (in module dbm.dumb)
 
      - (in module dbm.gnu)
 
      - (in module dbm.ndbm)
 
      - (in module gzip)
 
      - (in module io)
 
      - (in module lzma)
 
      - (in module os)
 
      - (in module ossaudiodev)
 
      - (in module shelve)
 
      - (in module sunau)
 
      - (in module tarfile)
 
      - (in module tokenize)
 
      - (in module wave)
 
      - (in module webbrowser)
 
      - (pipes.Template method)
 
      - (tarfile.TarFile method)
 
      - (telnetlib.Telnet method)
 
      - (urllib.request.OpenerDirector method)
 
      - (urllib.request.URLopener method)
 
      - (webbrowser.controller method)
 
      - (zipfile.ZipFile method)
 
    
    - open_new() (in module webbrowser)
 
    
      - (webbrowser.controller method)
 
    
  | 
  
    - open_new_tab() (in module webbrowser)
 
    
      - (webbrowser.controller method)
 
    
    - open_osfhandle() (in module msvcrt)
 
    - open_unknown() (urllib.request.URLopener method)
 
    - OpenDatabase() (in module msilib)
 
    - OpenerDirector (class in urllib.request)
 
    - openfp() (in module sunau)
 
    
      - (in module wave)
 
    
    - OpenKey() (in module winreg)
 
    - OpenKeyEx() (in module winreg)
 
    - openlog() (in module syslog)
 
    - openmixer() (in module ossaudiodev)
 
    - openpty() (in module os)
 
    
      - (in module pty)
 
    
    - OpenSSL
 
    
      - (use in module hashlib)
 
      - (use in module ssl)
 
    
    - OPENSSL_VERSION (in module ssl)
 
    - OPENSSL_VERSION_INFO (in module ssl)
 
    - OPENSSL_VERSION_NUMBER (in module ssl)
 
    - OpenView() (msilib.Database method)
 
    - operation
 
    
      - Boolean
 
      - binary arithmetic
 
      - binary bitwise
 
      - concatenation
 
      - null, [1]
 
      - repetition
 
      - shifting
 
      - slice
 
      - subscript
 
      - unary arithmetic
 
      - unary bitwise
 
    
    - operations
 
    
      - Boolean, [1]
 
      - bitwise
 
      - masking
 
      - shifting
 
    
    - operations on
 
    
      - dictionary type
 
      - integer types
 
      - list type
 
      - mapping types
 
      - numeric types
 
      - sequence types, [1]
 
    
    - operator
 
    
      - !=
 
      - %
 
      - &
 
      - *
 
      - **
 
      - +
 
      - -
 
      - /
 
      - //
 
      - <
 
      - <<
 
      - <=
 
      - ==
 
      - >
 
      - >=
 
      - >>
 
      - ^
 
      - and, [1], [2]
 
      - comparison
 
      - in, [1], [2]
 
      - is, [1]
 
      - is not, [1]
 
      - not, [1]
 
      - not in, [1], [2]
 
      - or, [1], [2]
 
      - overloading
 
      - precedence
 
      - ternary
 
    
    - operator (2to3 fixer)
 
    
      - (module)
 
    
    - operators
 
    - opmap (in module dis)
 
    - opname (in module dis)
 
    - optimize() (in module pickletools)
 
    - OPTIMIZED_BYTECODE_SUFFIXES (in module importlib.machinery)
 
    - OptionGroup (class in optparse)
 
    - OptionMenu (class in tkinter.tix)
 
    - OptionParser (class in optparse)
 
    - options (doctest.Example attribute)
 
    
      - (ssl.SSLContext attribute)
 
    
    - options() (configparser.ConfigParser method)
 
    - optionxform() (configparser.ConfigParser method)
 
    
      - (in module configparser)
 
    
    - optparse (module)
 
    - or
 
    
      - bitwise
 
      - exclusive
 
      - inclusive
 
      - operator, [1], [2]
 
    
    - or_() (in module operator)
 
    - ord
 
    
      - built-in function
 
    
    - ord() (built-in function)
 
    - order
 
    
      - evaluation
 
    
    - ordered_attributes (xml.parsers.expat.xmlparser attribute)
 
    - OrderedDict (class in collections)
 
    - origin_req_host (urllib.request.Request attribute)
 
    - origin_server (wsgiref.handlers.BaseHandler attribute)
 
    - os
 
    
      - module
 
    
    - os (module)
 
    - os.path (module)
 
    - os_environ (wsgiref.handlers.BaseHandler attribute)
 
    - OSError
 
    - ossaudiodev (module)
 
    - OSSAudioError
 
    - output
 
    
      - standard
 
    
    - output (subprocess.CalledProcessError attribute)
 
    
      - (subprocess.TimeoutExpired attribute)
 
    
    - output() (http.cookies.BaseCookie method)
 
    
      - (http.cookies.Morsel method)
 
    
    - output_charset (email.charset.Charset attribute)
 
    - output_charset() (gettext.NullTranslations method)
 
    - output_codec (email.charset.Charset attribute)
 
    - output_difference() (doctest.OutputChecker method)
 
    - OutputChecker (class in doctest)
 
    - OutputString() (http.cookies.Morsel method)
 
    - over() (nntplib.NNTP method)
 
    - Overflow (class in decimal)
 
    - OverflowError
 
    
      - (built-in exception), [1], [2], [3], [4]
 
    
    - overlaps() (ipaddress.IPv4Network method)
 
    
      - (ipaddress.IPv6Network method)
 
    
    - overlay() (curses.window method)
 
    - overloading
 
    
      - operator
 
    
    - overwrite() (curses.window method)
 
  |