Python: loop over dictionary of strings to declare variable name

Question

I declare two variables via

self.var_country_AT = BooleanVar(value=self.parameter.country_AT)
self.var_country_IT = BooleanVar(value=self.parameter.country_IT)

Is there a possibility to loop over AT and IT in the following sense:

countries = {'AT', 'IT'}
for c in countries:
  self.var_country_c = BooleanVar(value=self.parameter.country_c)

This does not work of course. Generally, I need to glue the string to a variable name.