Tips and Traps¶

1. If you schedule a job $J_1$ using schedule in IPython shell, and then interrupt the following loop that checks and runs pending jobs,

   while True:
        schedule.run_pending()
   

   the scheduled job $J_1$ is still there unless you stop the current IPython shell. The effective consequence of this is that if you schedule another job $J_2$, and start to run it using the following loop,

This notebook present a minimum example on how to use Spark with the Almond Scala kernel in Jupyterlab. Notice that Spark 2.4.2 is used since it is the only stable Spark version that supports Scala 2.12 as of now. Please refer to almond-sh/examples for more examples.

Comments¶

1. PIL.ImageGrab works on macOS and Windows only.

1. PIL.ImageGrab is relatively slow. python-mss and PyQt5 are better alternatives if performance of screenshot is critical. Notice that saving an (e.g., PNG) image can take significant time (might take up to 0.5 seconds) too, this is often due to image compression is slow. Lower the compression level can significant reduce the time needed to save an image. Please refer to Saving a PNG file is slow