Frequently Asked Questions

Frequently asked questions on the usage of precise_scheduler. Did you get here using an ‘old’ link and expected to see more questions?

AttributeError: ‘module’ object has no attribute ‘every’

I’m getting

AttributeError: 'module' object has no attribute 'every'

when I try to use precise_scheduler.

This happens if your code imports the wrong precise_scheduler module. Make sure you don’t have a precise_scheduler.py file in your project that overrides the precise_scheduler module provided by this library.

ModuleNotFoundError: No module named ‘precise_scheduler’

It seems python can’t find the precise_scheduler package. Let’s check some common causes.

Did you install precise_scheduler? If not, follow Installation. Validate installation:

  • Did you install using pip? Run pip3 list | grep precise_scheduler. This should return precise_scheduler   0.6.0 (or a higher version number)

  • Did you install using apt? Run dpkg -l | grep python3-precise_scheduler. This should return something along the lines of python3-precise_scheduler     0.3.2-1.1     Job scheduling for humans (Python 3) (or a higher version number)

Are you used python 3 to install precise_scheduler, and are running the script using python 3? For example, if you installed precise_scheduler using a version of pip that uses Python 2, and your code runs in Python 3, the package won’t be found. In this case the solution is to install precise_scheduler using pip3: pip3 install precise_scheduler.

Are you using virtualenv? Check that you are running the script inside the same virtualenv where you installed precise_scheduler.

Is this problem occurring when running the program from inside and IDE like PyCharm or VSCode? Try to run your program from a commandline outside of the IDE. If it works there, the problem is with your IDE configuration. It might be that your IDE uses a different Python interpreter installation.

Still having problems? Use Google and StackOverflow before submitting an issue.

ModuleNotFoundError: ModuleNotFoundError: No module named ‘pytz’

This error happens when you try to set a timezone in .at() without having the pytz package installed. Pytz is a required dependency when working with timezones. To resolve this issue, install the pytz module by running pip install pytz.

Does precise_scheduler support time zones?

Yes! See Timezones.

What if my task throws an exception?

See Exception Handling.

How can I run a job only once?

See Examples.

How can I cancel several jobs at once?

See Examples.

How to execute jobs in parallel?

See Parallel Execution.

How to continuously run the scheduler without blocking the main thread?

Background Execution.

Another question?

If you are left with an unanswered question, browse the issue tracker to see if your question has been asked before. Feel free to create a new issue if that’s not the case. Thank you 😃