fcntl error on windows #509

stranac · 2015-03-15T17:38:26Z

Getting the following error when running bpython-curses:

Traceback (most recent call last):
  File "C:\Python27\lib\runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python27\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Python27\Scripts\bpython-curses.exe\__main__.py", line 5, in <module>
  File "C:\Python27\lib\site-packages\bpython\cli.py", line 84, in <module>
    from bpython import repl
  File "C:\Python27\lib\site-packages\bpython\repl.py", line 56, in <module>
    from bpython.history import History
  File "C:\Python27\lib\site-packages\bpython\history.py", line 34, in <module>
    from bpython.filelock import FileLock
  File "C:\Python27\lib\site-packages\bpython\filelock.py", line 33, in <module>
    class FileLock(object):
  File "C:\Python27\lib\site-packages\bpython\filelock.py", line 39, in FileLock
    def __init__(self, fd, mode=fcntl.LOCK_EX):
NameError: name 'fcntl' is not defined

This is due to fcntl not being defined on windows, and default arguments being evaluated on definition time.

The text was updated successfully, but these errors were encountered:

thomasballinger · 2015-03-15T17:42:23Z

Ha I just wrote the same code :)

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at> (cherry picked from commit e83fb4a)

den-run-ai · 2015-12-30T18:15:32Z

even on bpython master still this error, but in blessings packages:

$ bpython
Traceback (most recent call last):
  File "c:\python\python27\envs\py34\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python\python27\envs\py34\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Python\Python27\envs\py34\Scripts\bpython.exe\__main__.py", line 5, in <module>
  File "c:\python\python27\envs\py34\lib\site-packages\bpython\curtsies.py", line 9, in <module>
    import curtsies
  File "c:\python\python27\envs\py34\lib\site-packages\curtsies\__init__.py", line 4, in <module>
    from .window import FullscreenWindow, CursorAwareWindow
  File "c:\python\python27\envs\py34\lib\site-packages\curtsies\window.py", line 30, in <module>
    import blessings
  File "c:\python\python27\envs\py34\lib\site-packages\blessings\__init__.py", line 7, in <module>
    from fcntl import ioctl
ImportError: No module named 'fcntl'

den-run-ai · 2015-12-30T18:20:48Z

this is a deeper issue with blessing/fcntrl:

erikrose/blessings#21

den-run-ai · 2015-12-30T18:38:45Z

ok, installed curses from this link below and bpython from master and now 'bpython-curses' works!

http://www.lfd.uci.edu/~gohlke/pythonlibs/#curses

http://docs.bpython-interpreter.org/windows.html

carlosperate · 2016-10-28T10:04:22Z

I'm using Python 3.5.2 32 bit on Windows 7 x64, have installed curses and pyreadline as indicated in the readme and I am encountering the same problem with fcntl:

Traceback (most recent call last):
  File "C:\Python35\Lib\runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Python35\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\atencioc\Envs\py3bpy\Scripts\bpython.exe\__main__.py", line 5, in <module>
  File "c:\users\atencioc\envs\py3bpy\lib\site-packages\bpython\curtsies.py", line 9, in <module>
    import curtsies
  File "c:\users\atencioc\envs\py3bpy\lib\site-packages\curtsies\__init__.py", line 4, in <module>
    from .window import FullscreenWindow, CursorAwareWindow
  File "c:\users\atencioc\envs\py3bpy\lib\site-packages\curtsies\window.py", line 11, in <module>
    import blessings
  File "c:\users\atencioc\envs\py3bpy\lib\site-packages\blessings\__init__.py", line 7, in <module>
    from fcntl import ioctl
ImportError: No module named 'fcntl'

pip freeze:

blessings==1.6
bpython==0.16
curses==2.2
curtsies==0.2.11
greenlet==0.4.10
Pygments==2.1.3
pyreadline==2.1
requests==2.11.1
six==1.10.0
wcwidth==0.1.7
wheel==0.24.0

thomasballinger · 2016-10-28T19:22:42Z

@carlosperate, because of the Blessings dependency problem described upthread erikrose/blessings#21, only bpython-curses works properly on Windows right now.

carlosperate · 2016-10-28T20:03:07Z

If that's a known problem and there is a known workaround why are the instructions for Windows still incorrect? I'm away for a few days, so I can't test it, but sounds like the only fix I need to do is to install a different package than the one listed on the README?

thomasballinger · 2016-10-28T20:11:57Z

Nothing different to install, you'll want to run a different executable, bpython-curses instead of bpython. We should absolutely update the readme since it's been a while and erikrose/blessings#21 hasn't been fixed. Created #649 for this.

carlosperate · 2016-10-29T12:35:59Z

Oh, I see, thanks for the clarification and opeoenin the other issue
Thomas!

On 28 Oct 2016 21:11, "Thomas Ballinger" notifications@github.com wrote:

Nothing different to install, you'll want to run a different executable,
bpython-curses instead of bpython. We should absolutely update the readme
since it's been a while and erikrose/blessings#21
erikrose/blessings#21 hasn't been fixed.
Created #649 #649 for this.

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
#509 (comment),
or mute the thread
https://github.com/notifications/unsubscribe-auth/AD_sTiLvBTsREVq9J1SXWniZRSGad6Ihks5q4lcOgaJpZM4Du-vU
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johnd0e · 2021-06-14T10:21:59Z

I don't think you can get fcntl on Windows.

But according https://stackoverflow.com/review/suggested-edits/18134290 you can put such stub to Libs directory:

# Variables with simple values

FASYNC = 64

FD_CLOEXEC = 1

F_DUPFD = 0
F_FULLFSYNC = 51
F_GETFD = 1
F_GETFL = 3
F_GETLK = 7
F_GETOWN = 5
F_RDLCK = 1
F_SETFD = 2
F_SETFL = 4
F_SETLK = 8
F_SETLKW = 9
F_SETOWN = 6
F_UNLCK = 2
F_WRLCK = 3

LOCK_EX = 2
LOCK_NB = 4
LOCK_SH = 1
LOCK_UN = 8

def fcntl(fd, op, arg=0):
    return 0
        
def ioctl(fd, op, arg=0, mutable_flag=True):
    if mutable_flag:
        return 0
    else:
        return ""
    
def flock(fd, op):
    return
        
def lockf(fd, operation, length=0, start=0, whence=0):
    return

Alternatively: use blessedinstead of blessings.

Alternatively: use pip install windows-curses (instead of curses from http://www.lfd.uci.edu/~gohlke/pythonlibs/#curses)

abubelinha · 2022-04-14T20:27:33Z

Nothing different to install, you'll want to run a different executable, bpython-curses instead of bpython. We should absolutely update the readme since it's been a while and erikrose/blessings#21 hasn't been fixed. Created #649 for this.

@thomasballinger I followed your instructions
But still getting errors when trying to run bpython-curses (same result if I try bpython).
I installed curses-2.2.1+utf8-cp38-cp38-win_amd64.whl.
I am on Windows 7 64bit, Python 3.8:

C:\Python38\scripts\pip install C:\soft\Python\wheels\curses-2.2.1+utf8-cp38-cp38-win_amd64.whl
Processing c:\soft\python\wheels\curses-2.2.1+utf8-cp38-cp38-win_amd64.whl
Installing collected packages: curses
Successfully installed curses-2.2.1+utf8

C:\Python38\scripts\pip install bpython
(...)
Successfully installed bpython-0.22.1

c:\Python38\scripts\bpython-curses
Traceback (most recent call last):
  File "c:\python38\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:Python38\scripts\bpython-curses.exe\__main__.py", line 4, in <module>
  File "c:python38\lib\site-packages\bpython\cli.py", line 71, in <module>
    from .config import getpreferredencoding
  File "c:python38\lib\site-packages\bpython\config.py", line 38, in <module>
    from .curtsiesfrontend.parse import CNAMES
  File "c:\python38\lib\site-packages\bpython\curtsiesfrontend\parse.py", line 3, in <module>
    from curtsies.formatstring import fmtstr, FmtStr
  File "c:\python38\lib\site-packages\curtsies\__init__.py", line 4, in <module>
    from .window import FullscreenWindow, CursorAwareWindow
  File "c:\python38\lib\site-packages\curtsies\window.py", line 24, in <module>
    import blessings
  File "c:\python38\lib\site-packages\blessings\__init__.py", line 7, in <module>
    from fcntl import ioctl
ModuleNotFoundError: No module named 'fcntl'

sebastinas closed this as completed in e83fb4a Mar 15, 2015

sebastinas added a commit that referenced this issue Mar 15, 2015

Change default to None and set it to LOCK_EX in __init__ (fixes #509)

6ac3311

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at> (cherry picked from commit e83fb4a)

den-run-ai mentioned this issue Dec 30, 2015

tab-completion launches executables xonsh/xonsh#364

Closed

thomasballinger mentioned this issue Oct 28, 2016

Update Windows instructions #649

Open

johnd0e mentioned this issue Jun 14, 2021

ModuleNotFoundError when running bpython #780

Closed

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fcntl error on windows #509

fcntl error on windows #509

stranac commented Mar 15, 2015

thomasballinger commented Mar 15, 2015

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den-run-ai commented Dec 30, 2015

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den-run-ai commented Dec 30, 2015

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den-run-ai commented Dec 30, 2015

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carlosperate commented Oct 28, 2016

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thomasballinger commented Oct 28, 2016

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carlosperate commented Oct 28, 2016

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thomasballinger commented Oct 28, 2016

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carlosperate commented Oct 29, 2016

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johnd0e commented Jun 14, 2021

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abubelinha commented Apr 14, 2022

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Uh oh!

fcntl error on windows #509

fcntl error on windows #509

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stranac commented Mar 15, 2015

thomasballinger commented Mar 15, 2015

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den-run-ai commented Dec 30, 2015

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den-run-ai commented Dec 30, 2015

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den-run-ai commented Dec 30, 2015

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carlosperate commented Oct 28, 2016

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thomasballinger commented Oct 28, 2016

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carlosperate commented Oct 28, 2016

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thomasballinger commented Oct 28, 2016

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carlosperate commented Oct 29, 2016

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johnd0e commented Jun 14, 2021

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abubelinha commented Apr 14, 2022

Uh oh!