For this release of Python in Maya, fixed arguments to Maya commands (for example, the x, y and z values for maya.cmds.move()) must be passed as individual arguments and cannot be packed into a tuple.
Flag names or short forms of flags in Maya commands that are reserved words in Python have been removed from the Maya Python
command syntax. For example:
“is” is a reserved keyword in Python, and is is not a valid short form flag name. Only the long form of the flag is valid (for example, internalSet for the addAttr command).
“break” is a reserved keyword in Python, and is not a valid long form flag. Only the short form of the flag is valid (for
example, b for the uvLink and lightlink commands).
Stacktracing (in the Script Editor, History > Show Stack Trace) only works for MEL. The stackTrace command was created for MEL to provide what Python does by default.
Executing single Python commands echoes results to the Script editor, but executing several Python commands in the Script editor does not. This is a property of embedded Python.
To see the returned results, you must explicitly print them.
