Modulenotfounderror no module named fcntl windows

Steps to Reproduce pip install metaflow metaflow Traceback (most recent call last): File "C:Program FilesPython37librunpy.py", line 193, in _run_module_as_main "__main__", m...

Steps to Reproduce

  1. pip install metaflow
  2. metaflow
Traceback (most recent call last):
  File "C:Program FilesPython37librunpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:Program FilesPython37librunpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:CodePythonCT83-PCvenvmetaflowScriptsmetaflow.exe__main__.py", line 5, in <module>
  File "d:codepythonct83-pcvenvmetaflowlibsite-packagesmetaflow__init__.py", line 45, in <module>
    from .event_logger import EventLogger
  File "d:codepythonct83-pcvenvmetaflowlibsite-packagesmetaflowevent_logger.py", line 1, in <module>
    from .sidecar import SidecarSubProcess
  File "d:codepythonct83-pcvenvmetaflowlibsite-packagesmetaflowsidecar.py", line 4, in <module>
    import fcntl
ModuleNotFoundError: No module named 'fcntl'

What I think the problem is?

The module fctnl is not available on Windows systems, which makes it impossible to run metaflow on Windows.

I am open to suggestions. 🤔

Update 1

Obvious Solution — Windows Sub-System for Linux

This is what I ended up doing, I used Ubuntu with WSL

References

https://stackoverflow.com/questions/45228395/error-no-module-named-fcntl
cs01/gdbgui#18
https://stackoverflow.com/questions/1422368/fcntl-substitute-on-windows

Did you get the ModuleNotFoundError: No Module Named 'fcntl'? This short tutorial will show you some useful ways that can help you resolve it.

The minimal occurrence of the error is when using Windows, for example, and you run import fcntl or any derivative of the import statement such as from fcntl import X but the fcntl package is not available on the operating system you’re trying this (e.g., Windows).

>>> import fcntl
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    import fcntl
ModuleNotFoundError: No module named 'fcntl'

It doesn’t help to run pip install fcntl either because there is no fcntl package for Windows. And on Linux fcntl is already part of the Python Standard Library!

PS C:Usersxcent> pip install fcntl
ERROR: Could not find a version that satisfies the requirement fcntl (from versions: none)
ERROR: No matching distribution found for fcntl

The reason this doesn’t work on Windows is that “this module performs file control and I/O control on file descriptors. It is an interface to the fcntl() and ioctl() Unix routines.” (docs)

And it doesn’t really make sense to find an fcntl replacement for Windows (although, technically, there are some things you can do even though they are NOT very clean). Learn more here if you want to go down that route:

👉 Recommended Tutorial: Is There an fcntl Replacement on Windows?

Clearly, fcntl can only work on Unix-based systems!

On those Unix-based systems (e.g., Linux) where fcntl is available however you don’t even need to install it because it’s part of the Python Standard Library as you can see on this screenshot from the official docs:

Let’s assume you are on a Unix-based system (e.g., Linux), and you have a working Python installation, so fctnl should be available. Can the error still occur?

Yes, it can (although it’s very unlikely). By far the most frequent reason in tha case is that your Python installation is corrupted and you’d be well-advised to install or reinstall Python again.

🌍 Recommended Tutorial: How to Check ‘fcntl‘ Package Version in Python?

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To help students reach higher levels of Python success, he founded the programming education website Finxter.com. He’s author of the popular programming book Python One-Liners (NoStarch 2020), coauthor of the Coffee Break Python series of self-published books, computer science enthusiast, freelancer, and owner of one of the top 10 largest Python blogs worldwide.

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I am Facing the following error: ModuleNotFoundError: No module named ‘fcntl’. Here I am going to give the solution to solve this error. I hope this will help you and save your day. Just try it. Lets learn this.

Contents

  1. How To fix ModuleNotFoundError: No module named ‘fcntl’ error?
  2. Answer 1 : Use portalocker
  3. Final Word
    • Also, Look at this solvderror

How To fix ModuleNotFoundError: No module named ‘fcntl’ error?

  1. How To fix ModuleNotFoundError: No module named ‘fcntl’ error?

    To fix ModuleNotFoundError: No module named ‘fcntl’ error just Use portalocker. Here to solve this error you should just use portalock as an alternative. It will help you for sure.

  2. ModuleNotFoundError: No module named ‘fcntl’

    To fix ModuleNotFoundError: No module named ‘fcntl’ error just Use portalocker. Here to solve this error you should just use portalock as an alternative. It will help you for sure.

Answer 1 : Use portalocker

Here to solve this error you should just use portalock as an alternative. It will help you for sure.

Final Word

So just use the given solution to solve this error. I hope this article will help you. Thank you!

Also, Look at this solvderror

  • npm ERR! Could not resolve dependency: npm ERR! peer [email protected]”^16.8.0 || ^17.0.0″ from @material-ui/[email protected]
  • TypeError: Descriptors cannot not be created directly
  • Property ‘…’ has no initializer and is not definitely assigned in the constructor
  • Minimum supported Gradle version is 7.3.3. Current version is 7.2
  • You may need an additional loader to handle the result of these loaders.

При использовании пакета django-crontab об ошибке сообщается после завершения установки:

ModuleNotFoundError: No module named ‘fcntl’ 

Я не мог запустить это, поэтому я отсортировал.

причина

Эта ошибка заключается в том, что Python не хватает соответствующего модуля FCNTL. Этот модуль поставляется с Python, но Windows, похоже, не является. Различные загрузки на форуме. На самом деле, код очень прост, просто ущипните одну руку.

решение

Создайте новый файл fncl.py (также блокнот), введите следующий код и сохраните его в каталог установки PythonLibПод содержимым

(Например, C: python python36 lib):

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

После этого вы не сообщите об ошибке.

Конечно, неправильное не сообщается. Django-Crontab все еще не может использоваться нормально. Для этого выпуска см. В другом блоге моей статьи:

https://blog.csdn.net/Myisking/article/details/82320894

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Open


Issue created Oct 17, 2019 by AJ Steers@aaronsteersOwner0 of 2 checklist items completed0/2 checklist items

ModuleNotFoundError: ‘fcntl’ on Windows (Gunicorn + meltano ui)

What is the current bug behavior?

On a brand new project and new meltano install on Windows (Windows 10 Insiders with Python3.7) I’m receiving an error about missing the fcntl module, and the command fails.

ModuleNotFoundError: No module named 'fcntl'
[AirflowWorker][ERROR][2019-10-17 11:22:26,094] Failed to start plugin <meltano.core.plugin.airflow.Airflow object at 0x000001C93E882438>.

What is the expected correct behavior?

I expect this command to launch the UI server.

Steps to reproduce

On Windows:

pip install meltano
meltano init meltano-demo
cd meltano-demo
meltano ui

Relevant logs and/or screenshots

Please use code blocks («`) to format console output

(meltano) c:FilesSourcedataops-quickstartmeltano-demo>meltano ui
[MainThread][INFO][2019-10-17 11:22:25,629] Context impl SQLiteImpl.
[MainThread][INFO][2019-10-17 11:22:25,630] Will assume non-transactional DDL.
System database up-to-date.
[MainThread][INFO][2019-10-17 11:22:25,783] Auto-compiling models in 'C:FilesSourcedataops-quickstartmeltano-demomodel'
[MainThread][INFO][2019-10-17 11:22:25,787] All workers started.
Traceback (most recent call last):
  File "C:Python37librunpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:Python37librunpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:FilesvenvsmeltanoScriptsgunicorn.exe__main__.py", line 5, in <module>
  File "c:filesvenvsmeltanolibsite-packagesgunicornappwsgiapp.py", line 9, in <module>
    from gunicorn.app.base import Application
  File "c:filesvenvsmeltanolibsite-packagesgunicornappbase.py", line 12, in <module>
    from gunicorn import util
  File "c:filesvenvsmeltanolibsite-packagesgunicornutil.py", line 9, in <module>
    import fcntl
ModuleNotFoundError: No module named 'fcntl'
[AirflowWorker][ERROR][2019-10-17 11:22:26,094] Failed to start plugin <meltano.core.plugin.airflow.Airflow object at 0x000001C93E882438>.
Exception in thread AirflowWorker:
Traceback (most recent call last):
  File "C:Python37libthreading.py", line 917, in _bootstrap_inner
    self.run()
  File "c:filesvenvsmeltanolibsite-packagesmeltanoapiworkers.py", line 201, in run
    self.start_all()
  File "c:filesvenvsmeltanolibsite-packagesmeltanoapiworkers.py", line 177, in start_all
    self._webserver = invoker.invoke("webserver", "-w", "1", stdout=webserver)
  File "c:filesvenvsmeltanolibsite-packagesmeltanocoreplugin_invoker.py", line 122, in invoke
    process = subprocess.Popen(popen_args, **Popen_options)
  File "C:Python37libsubprocess.py", line 775, in __init__
    restore_signals, start_new_session)
  File "C:Python37libsubprocess.py", line 1178, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

Possible fixes

N/A

Further regression test

Ensure we automatically catch similar issues in the future

  • Write additional adequate test cases and submit test results
  • Test results should be reviewed by a person from the team

Edited Apr 06, 2022 by AJ Steers

Я делаю приложение на Django, и хочу его загрузить на Heroku, в терминале ввожу gunicorn MK_ONLINE_FROM_VSS.wsgi Ошибка: Traceback (most recent call last):
File «c:usersuserappdatalocalprogramspythonpython38librunpy.py», line 193, in _run_module_as_main
return _run_code(code, main_globals, None,
File «c:usersuserappdatalocalprogramspythonpython38librunpy.py», line 86, in _run_code
exec(code, run_globals)
File «C:UsersUserAppDataLocalProgramsPythonPython38Scriptsgunicorn.exe__main__.py», line 5, in
File «c:usersuserappdatalocalprogramspythonpython38libsite-packagesgunicornappwsgiapp.py», line 9, in
from gunicorn.app.base import Application
File «c:usersuserappdatalocalprogramspythonpython38libsite-packagesgunicornappbase.py», line 11, in
from gunicorn import util
File «c:usersuserappdatalocalprogramspythonpython38libsite-packagesgunicornutil.py», line 9, in
import fcntl
ModuleNotFoundError: No module named ‘fcntl’
Почему? Раньше использовал Python 3.9 а сейчас 3.8.
Раньше я делал ето! (На ином комп’ютере!)


  • Вопрос задан

    более двух лет назад

  • 734 просмотра

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