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From Feng Chen:

when I try the "slicer.util.loadFiducialList('F.acsv')" , it does not work. How can I add the .acsv file?

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From Nicole:

That utility method is to load Slicer3 fiducial lists with the .fcsv
extension.

In order to load Slicer4 annotation fiducials with the .acsv extension,
you should be able to do the following:

properties = {}
properties['fileName'] = '/path/to/F.acsv'
annotFileType = 'AnnotationFile'
slicer.app.coreIOManager().loadNodes(annotFileType, properties)

but that's returning false for me as well.
Once it's debugged (working on it) it should get added to the util
python script.