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https://issues.apache.org/jira/browse/BEAM-8959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16994909#comment-16994909
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Thomas Weise commented on BEAM-8959:
------------------------------------

[https://stackoverflow.com/questions/15008758/parsing-boolean-values-with-argparse]

Maybe the option should just be --disable_metrics if the default is true. I 
would find that more intuitive.

> Boolean pipeline options which default to true cannot be set to false
> ---------------------------------------------------------------------
>
>                 Key: BEAM-8959
>                 URL: https://issues.apache.org/jira/browse/BEAM-8959
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Maximilian Michels
>            Priority: Critical
>
> With the included argument parser, any boolean pipeline options which default 
> to true cannot be set to false, e.g. {{--enable_metrics=false}}:
> {noformat}
> error: argument --enable_metrics: ignored explicit argument 'false'
> {noformat}



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