[Python] Dynamically change one of f-string variables

Is there a way to dynamically change/substitute one of f-string variables? Let's say I have format as follows:

expected = f'{var} {self.some_evaluation_1(var)} {self.some_evaluation_2(var)}'


Then I have test case with multiple assertions:

var1='some value 1'
var2='some value 2'
var3='some value 3'

var=var1
self.assertEqual('some great value1', expected)
var=var2
self.assertEqual('some great value2', expected)
var=var3
self.assertEqual('some great value3', expected)



Is there a way to make f-string use my variable instead of defined in initial format?

# Let's say something like this? It's just a concept I know it doesn't work.
self.assertEqual('some great value1', expected % var1)

Continue reading...