Question

mins_by_phone(phone): calculate and return the number of call minutes associated with the given phone line in this plan based on

Answer 1

def mins_by_phone(phone):

if phone in self.phones:

min_sum = 0

for call in calls:

min_sum += call

return min_sum

else:

return 0

Step-by-step explanation:

The mins_by_phone function above is the Phone class method. It checks for the presence of the argument value in the self.phones instance variable, which is a list and sums up and returns the call minutes in the call list.