[Maya-Python] PyMel Button.getCommand() returns empty string if command isn't a string

[hapgilmore]

Example Code:

def printFoo():
        print 'foo'

win = Window()
col = columnLayout()
but = Button()
but.setCommand(Callback(printFoo))
cmd = but.getCommand()
# Result:  #

but.setCommand('Callback(printFoo)')
cmd = but.getCommand()
# Result: Callback(printFoo) #
#however, turning the command into a string prevents it from working

is this a PyMel bug?

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