passing dictionary as parameter in csp python gives unhashable type: 'dict'

Question

I am applying the CSP in python having problem when passing dictionary as a parameter to a method in python

officerDomain = range(0, 2**scheduleDays-1)

solver = MinConflictsSolver()
problem = Problem(solver)

officers = []
officers.append({'name':'Ryan', 'rank':'3'})
officers.append({'name':'Mond', 'rank':'1'})
officers.append({'name':'Eric', 'rank':'3'})


for officer in officers:
    print(officer)
    problem.addVariable(officer, officerDomain)

While passing the dictionary inside the list it gives the error unhashable type: 'dict'

Answer 1

Let's read the documentation :

addVariable(self, variable, domain)

Parameters : variable - Object representing a problem variable (type=hashable object)

So you can't use a dictionary (officer in this case) because it's unhashable. Try with officer["name"] for example.