[issue2920] Patch to print symbolic value of errno in OSError.__str__()

[Eryk Sun]

Change by Eryk Sun :


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versions: +Python 3.10 -Python 3.9

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[issue2920] Patch to print symbolic value of errno in OSError.__str__()

[Zackery Spytz]

Zackery Spytz  added the comment:

Eryk, I'm not sure if something similar should be done for winerror. I think 
it's best to keep OSError_str() as simple as possible.

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[issue2920] Patch to print symbolic value of errno in OSError.__str__()

[Eryk Sun]

Eryk Sun  added the comment:

How about doing something similar for Windows when winerror is set? This is a 
common case since many os functions use the Windows API directly. Showing the 
symbolic error name will help to disambiguate exceptions, such as 

FileNotFoundError (ENOENT) from:

ERROR_FILE_NOT_FOUND
ERROR_PATH_NOT_FOUND
ERROR_FILENAME_EXCED_RANGE
ERROR_BAD_PATHNAME
ERROR_BAD_NET_NAME

PermissionError (EACCES) from:

ERROR_ACCESS_DENIED
ERROR_SHARING_VIOLATION
ERROR_LOCK_VIOLATION
ERROR_NETWORK_ACCESS_DENIED
ERROR_NOT_READY

It could also support additional error codes that are common or used 
internally, such as 

ERROR_NOT_SUPPORTED
ERROR_INVALID_NAME
ERROR_MOD_NOT_FOUND
ERROR_PRIVILEGE_NOT_HELD
ERROR_CANT_RESOLVE_FILENAME
ERROR_INVALID_REPARSE_DATA

Modules/_winapi.c:

ERROR_NETNAME_DELETED
ERROR_SEM_TIMEOUT
ERROR_PIPE_BUSY
ERROR_MORE_DATA
ERROR_PIPE_CONNECTED
ERROR_OPERATION_ABORTED
ERROR_IO_PENDING
ERROR_NO_SYSTEM_RESOURCES

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nosy: +ZackerySpytz, eryksun

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[issue2920] Patch to print symbolic value of errno in OSError.__str__()

[Zackery Spytz]

Change by Zackery Spytz :


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title: Patch to print symbolic value or errno in EnvironmentError.__str__() -> 
Patch to print symbolic value of errno in OSError.__str__()
versions: +Python 3.9 -Python 3.3

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