I’ve got this at the end of my script:
if name == ‘main’:
main()
Why doesn’t Bokeh Server run the stuff inside my defined main function? Thanks.
Archived discussions · Captured October 28, 2026
Bokeh Server doesn't run my main function
Hi,
The Bokeh server is a bit like the Jupyter notebook server. It's a program that runs other python code in a special way, in order to add some capabilities. Although we have tried to make things behave like "normal python" in order to minimize surprises, the fact is that running "bokeh server foo.py" is *not* identical to running "python foo.py".
I supposed it's possible we could explicitly instrument scripts we execute by setting __name__ by hand before executing them. But this would need some discussion and investigation, to make sure there are not any unintended consequences. (Or maybe it would need to be configurable). Feel free to open a GH issue about it.
In the mean time, I'd just say, this sort of thing is just not the way to write a bokeh app script, and that have it function you'll need to call main() at the bottom unconditionally.
Thanks,
Bryan
···
On Mar 24, 2017, at 12:30, Tommy Carstensen <tommy.carstensen@gmail.com> wrote:
I've got this at the end of my script:
if __name__ == '__main__':
main()Why doesn't Bokeh Server run the stuff inside my defined main function? Thanks.
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Thanks Bryan. I fixed it already. It was just unexpected behaviour. I just got my very first Bokeh Serve(r) plot to work. I’m well excited. Thanks!
···
On Fri, 24 Mar 2017 at 17:45 Bryan Van de ven bryan@bokeh.org wrote:
Hi,
The Bokeh server is a bit like the Jupyter notebook server. It’s a program that runs other python code in a special way, in order to add some capabilities. Although we have tried to make things behave like “normal python” in order to minimize surprises, the fact is that running “bokeh server foo.py” is not identical to running “python foo.py”.
I supposed it’s possible we could explicitly instrument scripts we execute by setting name by hand before executing them. But this would need some discussion and investigation, to make sure there are not any unintended consequences. (Or maybe it would need to be configurable). Feel free to open a GH issue about it.
In the mean time, I’d just say, this sort of thing is just not the way to write a bokeh app script, and that have it function you’ll need to call main() at the bottom unconditionally.
Thanks,
Bryan
On Mar 24, 2017, at 12:30, Tommy Carstensen tommy.carstensen@gmail.com wrote:
I’ve got this at the end of my script:
if name == ‘main’:
main()Why doesn’t Bokeh Server run the stuff inside my defined main function? Thanks.
–
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