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title: machine_var(name)


This is an MPF Event

The content on this page is technical documentation for an MPF Event.

Posted when a machine variable is added or changes value. (Machine variables are like player variables, except they're maintained machine-wide instead of per-player or per-game.)

Keyword arguments

(See the Conditional Events guide for details for how to create entries in your config file that only respond to certain combinations of the arguments below.)


: If the machine variable just changed, this will be the amount of the change. If it's not possible to determine a numeric change (for example, if this machine variable is a list), then this change value will be set to the boolean True.


: The previous value of this machine variable, e.g. what it was before the current value.


: The new value of this machine variable.

Event is posted by machine_vars:

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