not sure how robust this is, but it seems to work:
import maya.cmds as cmds
import maya.mel as mel
def isValidMelCmd( cmdStr ):
undoState = cmds.undoInfo(q=1, state=1)
cmds.undoInfo(state=1)
isValid = None
try:
mel.eval(cmdStr)
except:
isValid = False
else:
isValid = True
cmds.undo()
finally:
cmds.undoInfo(state=undoState)
return isValid
isValidMelCmd( "setAttr persp.tx 2" )
# Result: True #
isValidMelCmd( "3etAttr persp.tx 2" )
# Result: False #
if you wanted to make it work for python statements, it wouldn't be
hard. just use eval instead of mel.eval
-chad
On Aug 27, 2009, at 10:13 PM, Taylor Carrasco wrote:
> Is there a way to validate a mel command is valid (not necessarily
> that it will execute properly) before running it?
>
> Something like .....
> cmdValid("setAttr "PUP1:root_ctrl.extraRotY" 20;") returns true
> cmdValid("3etAttr "PUP1:root_ctrl.extraRotY" 20;") returns false
>
>
> >
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http://groups.google.com/group/python_inside_maya
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