[Distutils] specifying a requirement on multiple setuptools extras

[Chris Withers]

Hi All,

Say I have a package, mortar, that offers multiple extras options for 
different data storage mechanisms, eg: sqlalchemy, zodb, simpledb

If I want to use this in a project and want both the sqlalchemy and zodb 
backends, how do I spell this?

easy_install mortar[sqlalchemy,zodb]

easy_install mortar[sqlalchemy]
easy_install mortar[zodb]

...or something else?

cheers,

Chris

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