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mvpa2.kernels.sg.exists

mvpa2.kernels.sg.exists(dep, force=False, raise_=False, issueWarning=None)

Test whether a known dependency is installed on the system.

This method allows us to test for individual dependencies without testing all known dependencies. It also ensures that we only test for a dependency once.

Parameters :

dep : string or list of string

The dependency key(s) to test.

force : boolean

Whether to force the test even if it has already been performed.

raise_ : boolean

Whether to raise RuntimeError if dependency is missing. If True, it is still conditioned on the global setting MVPA_EXTERNALS_RAISE_EXCEPTION, while would raise exception if missing despite the configuration if ‘always’.

issueWarning : string or None or True

If string, warning with given message would be thrown. If True, standard message would be used for the warning text.