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psana now lives in the anaconda environment.  You can clone the psana environment to into a local environment that you can control with a command like this (which will take some time because it has to copy several GB to the new environment):

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conda remove <packagename>

Virtualenv

NOTE: the virtualenv method is not compatible with our anaconda-based psana, but we leave the documentation here in case it is useful at some point.

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