some library may have set incompatible argtypes, restype, or errcheck values on ). (4) It uses windll, which causes problems when multiple libraries contend for the same functions (e.g. (3) It assumes the StandardOutput handle is a console output buffer, but maybe it's a pipe or file, and the program has manually opened CONOUT$ to write debug text in color. (2) It passes handles incorrectly as 32-bit int values, for which ctypes in 64-bit Python 2 may corrupt the high DWORD (if it works, it's only by accident ctypes doesn't zero the stack in ffi_prep_args). It's simpler, but there are several problems with it. Please don't use the code in issue 29059. Mode = mask = ENABLE_VIRTUAL_TERMINAL_PROCESSING Mode = (new_mode & mask) | (old_mode.value & ~mask) Kernel32.GetConsoleMode(hout, ref(old_mode)) # don't assume StandardOutput is a console. = (wintypes.HANDLE, wintypes.DWORD)ĭef set_conout_mode(new_mode, mask=0xffffffff): Raise ctypes.WinError(ctypes.get_last_error()) Kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)ĮNABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004 Depending on your needs, that could done in an atexit function. On success, it returns the previous console mode, which can be restored by calling set_conout_mode(mode). This is handled by raising NotImplementedError. If you're using an older version of Windows, or the legacy console in Windows 10, then enabling VT mode will fail as an invalid parameter. Here's some code to enable VT mode in Windows 10 - assuming you're not using the legacy console. There could also be a couple IntFlag enums for the available input and output mode values. Adding a set_console_mode method on console files would be a useful convenience to manage this state. It's failing to disable VT mode after it exits.Įnabling VT mode by default is potentially a problem because a console buffer's mode is shared, inherited state. You can get the same result via os.system(''). It appears you've found a bug in the case of "cmd.exe /c. It disables VT mode before starting other programs, and also at shutdown. If so, there seems to be resistance to enabling the feature by default, and preference to use existing APIs rather than adding a new API that enables it.Ĭmd.exe enables virtual terminal mode, but only for itself. Haven't tested it on other Python versions but it probably occurs on them too. Adding `subprocess.call('', shell=True)` before printing solved the issue. Windows 10 supports ANSI Escape Sequences ( (v=vs.85).aspx ) but Python just prints escape character. Tithen Firion, eryksun, martin.panter, paul.moore, steve.dower, terry.reedy, tim.golden, zach.wareĬreated on 16:21 by Tithen Firion, last changed 14:58 by admin. Windows: Python not using ANSI compatible console Printing ANSI Escape Sequences on Windows 10
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