`uerrno` – 系统错误代码

这个模块实现了相应 CPython 模块的一个子集，如下所述。有关更多信息，请参阅原始CPython文档: errno

此模块提供访问符号错误代码以进行 OSError 异常。特定的代码清单依赖于 MicroPython port.

常量

EEXIST, EAGAIN, etc.

错误代码，基于ANSI C/POSIX标准。所有错误代码开头都有“E”。错误通常可以访问为 exc.args[0] ，其中 exc 是 OSError 的一个实例

示例:

try:
    uos.mkdir("my_dir")
except OSError as exc:
    if exc.args[0] == uerrno.EEXIST:
        print("Directory already exists")

uerrno.errorcode

字典将数字错误代码映射到带有符号错误代码的字符串（参见上文）:

>>> print(uerrno.errorcode[uerrno.EEXIST])
EEXIST

异常	值	描述
`uerrno.EPERM`	1	Operation not permitted
`uerrno.ENOENT`	2	No such file or directory
`uerrno.ESRCH`	3	No such process
`uerrno.EINTR`	4	Interrupted system call
`uerrno.EIO`	5	I/O error
`uerrno.ENXIO`	6	No such device or address
`uerrno.E2BIG`	7	Argument list too long
`uerrno.ENOEXEC`	8	Exec format error
`uerrno.EBADF`	9	Bad file number
`uerrno.ECHILD`	10	No child processes
`uerrno.EAGAIN`	11	Try again
`uerrno.ENOMEM`	12	Out of memory
`uerrno.EACCES`	13	Permission denied
`uerrno.EFAULT`	14	Bad address
`uerrno.ENOTBLK`	15	Block device required
`uerrno.EBUSY`	16	Device or resource busy
`uerrno.EEXIST`	17	File exists
`uerrno.EXDEV`	18	Cross-device link
`uerrno.ENODEV`	19	No such device
`uerrno.ENOTDIR`	20	Not a directory
`uerrno.EISDIR`	21	Is a directory
`uerrno.EINVAL`	22	Invalid argument
`uerrno.ENFILE`	23	File table overflow
`uerrno.EMFILE`	24	Too many open files
`uerrno.ENOTTY`	25	Not a typewriter
`uerrno.ETXTBSY`	26	Text file busy
`uerrno.EFBIG`	27	File too large
`uerrno.ENOSPC`	28	No space left on device
`uerrno.ESPIPE`	29	Illegal seek
`uerrno.EROFS`	30	Read-only file system
`uerrno.EMLINK`	31	Too many links
`uerrno.EPIPE`	32	Broken pipe
`uerrno.EDOM`	33	Math argument out of domain of func
`uerrno.ERANGE`	34	Math result not representable
`uerrno.EWOULDBLOCK`	11	Operation would block
`uerrno.EOPNOTSUPP`	95	Operation not supported on transport endpoint
`uerrno.EAFNOSUPPORT`	97	Address family not supported by protocol
`uerrno.EADDRINUSE`	98	Address already in use
`uerrno.ECONNABORTED`	99	Software caused connection abort
`uerrno.ECONNRESET`	104	Connection reset by peer
`uerrno.ENOBUFS`	105	No buffer space available
`uerrno.EISCONN`	106	Transport endpoint is already connected
`uerrno.ENOTCONN`	107	Transport endpoint is not connected
`uerrno.ETIMEDOUT`	110	Connection timed out
`uerrno.ECONNREFUSED`	111	Connection refused
`uerrno.EHOSTUNREACH`	113	No route to host
`uerrno.EALREADY`	114	Operation already in progress
`uerrno.EINPROGRESS`	115	Operation now in progress

uerrno – 系统错误代码

常量

`uerrno` – 系统错误代码