NoConsoleScreenBufferError when executing the hello world example in Windows.

[jonmon6691]

Running on python 3.4, I was having trouble with django's manage.py shell command. I've narrowed it down to the prompt_toolkit module and can demonstrate the problem with this simple code:

>>> import prompt_toolkit
>>> prompt_toolkit.prompt("Hi")
Hi
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python34\lib\site-packages\prompt_toolkit\shortcuts.py", line 545, in prompt
    eventloop=eventloop)
  File "C:\Python34\lib\site-packages\prompt_toolkit\shortcuts.py", line 626, in run_application
    result = cli.run(reset_current_buffer=False)
  File "C:\Python34\lib\site-packages\prompt_toolkit\interface.py", line 391, in run
    self.renderer.request_absolute_cursor_position()
  File "C:\Python34\lib\site-packages\prompt_toolkit\renderer.py", line 343, in request_absolute_cursor_position
    self._min_available_height = self.output.get_rows_below_cursor_position()
  File "C:\Python34\lib\site-packages\prompt_toolkit\terminal\win32_output.py", line 287, in get_rows_below_cursor_position
    info = self.get_win32_screen_buffer_info()
  File "C:\Python34\lib\site-packages\prompt_toolkit\terminal\win32_output.py", line 150, in get_win32_screen_buffer_info
    raise NoConsoleScreenBufferError
prompt_toolkit.terminal.win32_output.NoConsoleScreenBufferError: No Windows console found. Are you running cmd.exe?
>>>

Let me know what other information I can provide

[jonmon6691]

I tried enabling the logging by changing _DEBUG_RENDER_OUTPUT to Trueand ran into another bug, Win32Output attempts to write to self.LOG before it's opened at the end of __init__. Moving the lines that open and define self.LOG above the call to get_win32_screen_buffer_info fixes this. Strangely, the original example no longer fails, and the log file looks like this:

Python 3.4.2 (v3.4.2:ab2c023a9432, Oct  6 2014, 22:16:31) [MSC v.1600 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import prompt_toolkit as p
>>> p.prompt("Hi")
Hif
'f'
>>> ^Z

'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5420)>
     <class 'int'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC54A0)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleWindowInfo'
     76, True, <cparam 'P' (00000000046A5D90)>
     <class 'int'>, <class 'bool'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5660)>
     <class 'int'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5420)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5680)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputCharacterA'
     76, c_char(b' '), c_ulong(103), c_long(19595264), <cparam 'P' (00000000046A5E10)>
     <class 'int'>, <class 'ctypes.c_char'>, <class 'ctypes.c_ulong'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5380)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputAttribute'
     76, 7, 103, c_long(19595264), <cparam 'P' (00000000046A5E10)>
     <class 'int'>, <class 'int'>, <class 'int'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'Hi'
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC50E0)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleCursorPosition'
     76, c_long(19595264)
     <class 'int'>, <class 'ctypes.c_long'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5460)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleCursorPosition'
     76, c_long(19595266)
     <class 'int'>, <class 'ctypes.c_long'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC55E0)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'f'
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5480)>
     <class 'int'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5640)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleCursorPosition'
     76, c_long(19595264)
     <class 'int'>, <class 'ctypes.c_long'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC50E0)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputCharacterA'
     76, c_char(b' '), c_ulong(103), c_long(19595264), <cparam 'P' (00000000046A5E10)>
     <class 'int'>, <class 'ctypes.c_char'>, <class 'ctypes.c_ulong'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5100)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputAttribute'
     76, 7, 103, c_long(19595264), <cparam 'P' (00000000046A5E10)>
     <class 'int'>, <class 'int'>, <class 'int'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'Hi'
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'f'
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5620)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleCursorPosition'
     76, c_long(19595264)
     <class 'int'>, <class 'ctypes.c_long'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>
'\r\n'
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC5640)>
     <class 'int'>, <class 'CArgObject'>
'SetConsoleCursorPosition'
     76, c_long(19595264)
     <class 'int'>, <class 'ctypes.c_long'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC51E0)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputCharacterA'
     76, c_char(b' '), c_ulong(103), c_long(19595264), <cparam 'P' (00000000046A5790)>
     <class 'int'>, <class 'ctypes.c_char'>, <class 'ctypes.c_ulong'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'GetConsoleScreenBufferInfo'
     76, <cparam 'P' (0000000003AC51C0)>
     <class 'int'>, <class 'CArgObject'>
'FillConsoleOutputAttribute'
     76, 7, 103, c_long(19595264), <cparam 'P' (00000000046A5790)>
     <class 'int'>, <class 'int'>, <class 'int'>, <class 'ctypes.c_long'>, <class 'CArgObject'>
'SetConsoleTextAttribute'
     76, 7
     <class 'int'>, <class 'int'>

The debug logging must have a side-effect of some kind that is preventing the prompt call from failing. I think if we find that, we'll have a fix.

[stephenrauch]

Works for me...

C:\Python34>python
Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import prompt_toolkit as p
>>> p.prompt("Hi")
Hi
''
>>>

[jonathanslenders]

@jonmon6691 Are you executing this code from inside PyCharm or Idle? Or does it run in cmd.exe?

[jonmon6691]

It was run within cmd.exe

On Mon, Oct 24, 2016 at 11:15 AM, Jonathan Slenders <
notifications@github.com> wrote:

@jonmon6691 https://github.com/jonmon6691 Are you executing this code
from inside PyCharm or Idle? Or does it run in cmd.exe?

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
#406 (comment),
or mute the thread
https://github.com/notifications/unsubscribe-auth/ABPhf5vbQ5wIdE5P6XPuU5nFyD4WDMOZks5q3PXGgaJpZM4KZKls
.

[zhizunbao84]

i get that error, and i also run within cmd.exe

[erm3nda]

Same for me, first time that i got this kind of error. Ouput differs from ipython and jupyter console but the final error is the same. The notebook works.

Error:

line 150, in get_win32_screen_buffer_info
    raise NoConsoleScreenBufferError
NoConsoleScreenBufferError: No Windows console found. Are you running cmd.exe?

I've paste the whole cmd content here: http://pastebin.com/RW5AgyeL

[jonathanslenders]

@erm3nda: Which Windows version are you using? And is it 64 bit or 32 bit?

So far I still have not been able to reproduce it, but it seems that for some people it consistently fails, while for most people everything works consistently fine...

[erm3nda]

@jonathanslenders

This is under W10 x64, Python 2.7.1x, and i did launch it from cmd from admin account.
I'll try later using a regular user, maybe something changes, but i don't expect anything to run bad from admin... usually it's the opposite, and also changed cwd to User folder but didn't change anything.

I can try whatever you suggest. I don't really need ipython over this laptop with Windows, but i am also curious to know which kind of shit is under the hood :-) and wondering it's Windows fault :-)

Regards

[stephenrauch]

@erm3nda

From the pastebin:

Python 2.7 (r27:82525, Jul 4 2010, 07:43:08) [MSC v.1500 64 bit (AMD64)]

Is this really 2.7.0? mine says:

Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)] on win32

Mine is a newer, but is also 32bit not 64 bit. You and the OP are using 64 bit.

[erm3nda]

Seems i was wrong. The current output is 2.7... i think i downloaded the 2.7.10, but seems no.

Microsoft Windows [Versión 6.3.9600]
(c) 2013 Microsoft Corporation. Todos los derechos reservados.

C:\Windows\System32>python
Python 2.7 (r27:82525, Jul  4 2010, 07:43:08) [MSC v.1500 64 bit (AMD64)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>>

[jonathanslenders]

I have a possible solution. See: ipython/ipython#10070 (comment) . It's super weird...