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dfm / emcee

The Python ensemble sampling toolkit for affine-invariant MCMC

Home Page:https://emcee.readthedocs.io

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Progress bar

mtagliazucchi opened this issue · comments

commented

General information:

  • emcee version: 3.1.4
  • platform: Rocky Linux 8.6
  • installation method (pip/conda/source/other?): pip

Problem description:

I'm running emcee on a cluster using MPI. I use the option progress = True, but its output goes to in the .err file instead of the .out file. How can I fix it?

Expected behavior:

The output of the progress bar goes to the .out file.

Actual behavior:

The output of the progress bar goes to the .err file.

commented

Thanks for asking - this is the expected behavior! The progress bar is rendered to stderr by design. This progress bar is generated using tqdm, and you can pass arbitrary arguments to the tqdm.tqdm constructor (ref) using the progress_kwargs argument to sample or run_mcmc, so you may be able to have tqdm write to stdout if that's a behavior that you'd want, but I don't expect to support that out of the box in emcee.