Python Standard errno system symbols

>>>
>>> import errno
>>>
>>> help(errno)

>>>
>>> errno.ENOENT
2
>>>
>>> errno.errorcode[2]
'ENOENT'
>>>
>>>
>>>
>>> import os
>>>
>>>
>>> os.strerror(2)
'No such file or directory'
>>>
>>>
>>> for x in range(140):
...     x, '-->', os.strerror(x)
...
(0, '-->', 'Success')
(1, '-->', 'Operation not permitted')
(2, '-->', 'No such file or directory')
(3, '-->', 'No such process')
(4, '-->', 'Interrupted system call')
(5, '-->', 'Input/output error')
(6, '-->', 'No such device or address')
(7, '-->', 'Argument list too long')
(8, '-->', 'Exec format error')
(9, '-->', 'Bad file descriptor')
(10, '-->', 'No child processes')
(11, '-->', 'Resource temporarily unavailable')
(12, '-->', 'Cannot allocate memory')
(13, '-->', 'Permission denied')
(14, '-->', 'Bad address')
(15, '-->', 'Block device required')
(16, '-->', 'Device or resource busy')
(17, '-->', 'File exists')
(18, '-->', 'Invalid cross-device link')
(19, '-->', 'No such device')
(20, '-->', 'Not a directory')
(21, '-->', 'Is a directory')
(22, '-->', 'Invalid argument')
(23, '-->', 'Too many open files in system')
(24, '-->', 'Too many open files')
(25, '-->', 'Inappropriate ioctl for device')
(26, '-->', 'Text file busy')
(27, '-->', 'File too large')
(28, '-->', 'No space left on device')
(29, '-->', 'Illegal seek')
(30, '-->', 'Read-only file system')
(31, '-->', 'Too many links')
(32, '-->', 'Broken pipe')
(33, '-->', 'Numerical argument out of domain')
(34, '-->', 'Numerical result out of range')
(35, '-->', 'Resource deadlock avoided')
(36, '-->', 'File name too long')
(37, '-->', 'No locks available')
(38, '-->', 'Function not implemented')
(39, '-->', 'Directory not empty')
(40, '-->', 'Too many levels of symbolic links')
(41, '-->', 'Unknown error 41')
(42, '-->', 'No message of desired type')
(43, '-->', 'Identifier removed')
(44, '-->', 'Channel number out of range')
(45, '-->', 'Level 2 not synchronized')
(46, '-->', 'Level 3 halted')
(47, '-->', 'Level 3 reset')
(48, '-->', 'Link number out of range')
(49, '-->', 'Protocol driver not attached')
(50, '-->', 'No CSI structure available')
(51, '-->', 'Level 2 halted')
(52, '-->', 'Invalid exchange')
(53, '-->', 'Invalid request descriptor')
(54, '-->', 'Exchange full')
(55, '-->', 'No anode')
(56, '-->', 'Invalid request code')
(57, '-->', 'Invalid slot')
(58, '-->', 'Unknown error 58')
(59, '-->', 'Bad font file format')
(60, '-->', 'Device not a stream')
(61, '-->', 'No data available')
(62, '-->', 'Timer expired')
(63, '-->', 'Out of streams resources')
(64, '-->', 'Machine is not on the network')
(65, '-->', 'Package not installed')
(66, '-->', 'Object is remote')
(67, '-->', 'Link has been severed')
(68, '-->', 'Advertise error')
(69, '-->', 'Srmount error')
(70, '-->', 'Communication error on send')
(71, '-->', 'Protocol error')
(72, '-->', 'Multihop attempted')
(73, '-->', 'RFS specific error')
(74, '-->', 'Bad message')
(75, '-->', 'Value too large for defined data type')
(76, '-->', 'Name not unique on network')
(77, '-->', 'File descriptor in bad state')
(78, '-->', 'Remote address changed')
(79, '-->', 'Can not access a needed shared library')
(80, '-->', 'Accessing a corrupted shared library')
(81, '-->', '.lib section in a.out corrupted')
(82, '-->', 'Attempting to link in too many shared libraries')
(83, '-->', 'Cannot exec a shared library directly')
(84, '-->', 'Invalid or incomplete multibyte or wide character')
(85, '-->', 'Interrupted system call should be restarted')
(86, '-->', 'Streams pipe error')
(87, '-->', 'Too many users')
(88, '-->', 'Socket operation on non-socket')
(89, '-->', 'Destination address required')
(90, '-->', 'Message too long')
(91, '-->', 'Protocol wrong type for socket')
(92, '-->', 'Protocol not available')
(93, '-->', 'Protocol not supported')
(94, '-->', 'Socket type not supported')
(95, '-->', 'Operation not supported')
(96, '-->', 'Protocol family not supported')
(97, '-->', 'Address family not supported by protocol')
(98, '-->', 'Address already in use')
(99, '-->', 'Cannot assign requested address')
(100, '-->', 'Network is down')
(101, '-->', 'Network is unreachable')
(102, '-->', 'Network dropped connection on reset')
(103, '-->', 'Software caused connection abort')
(104, '-->', 'Connection reset by peer')
(105, '-->', 'No buffer space available')
(106, '-->', 'Transport endpoint is already connected')
(107, '-->', 'Transport endpoint is not connected')
(108, '-->', 'Cannot send after transport endpoint shutdown')
(109, '-->', 'Too many references: cannot splice')
(110, '-->', 'Connection timed out')
(111, '-->', 'Connection refused')
(112, '-->', 'Host is down')
(113, '-->', 'No route to host')
(114, '-->', 'Operation already in progress')
(115, '-->', 'Operation now in progress')
(116, '-->', 'Stale NFS file handle')
(117, '-->', 'Structure needs cleaning')
(118, '-->', 'Not a XENIX named type file')
(119, '-->', 'No XENIX semaphores available')
(120, '-->', 'Is a named type file')
(121, '-->', 'Remote I/O error')
(122, '-->', 'Disk quota exceeded')
(123, '-->', 'No medium found')
(124, '-->', 'Wrong medium type')
(125, '-->', 'Operation canceled')
(126, '-->', 'Required key not available')
(127, '-->', 'Key has expired')
(128, '-->', 'Key has been revoked')
(129, '-->', 'Key was rejected by service')
(130, '-->', 'Owner died')
(131, '-->', 'State not recoverable')
(132, '-->', 'Operation not possible due to RF-kill')
(133, '-->', 'Memory page has hardware error')
(134, '-->', 'Unknown error 134')
(135, '-->', 'Unknown error 135')
(136, '-->', 'Unknown error 136')
(137, '-->', 'Unknown error 137')
(138, '-->', 'Unknown error 138')
(139, '-->', 'Unknown error 139')
>>>