Problem with counters with '-' on name

[gabrielpreviato]

As stated by @gabrielfedel:

If you define a counter (on config.yml) with '-' on name, like (test-1), and uses a math counter scan will break.

This is related with this line on py4syn:

py4syn/py4syn/epics/PseudoCounterClass.py

Line 126 in ac97c22

exec(self.__defineCounters())

This line on py4syn basically executes the dynamically created string with the name of all counters registered in the counterDB. In other words, if there is a counter named "test-1", it will execute:

test-1 = "test-1"

Since Python don't allow variable names with hyphens, this will result in an error. A better implementation of this method should be done.