Updated all problems to use fstrings and results()

Problems/Problem31.py

@@ -1,7 +1,7 @@
 #ProjectEuler/Python/Problem31.py
 #Matthew Ellison
 # Created: 06-19-20
-#Modified: 07-19-20
+#Modified: 10-30-20
 #How many different ways can £2 be made using any number of coins?
 #Unless otherwise listed, all of my non-standard imports can be gotten from my pyClasses repository at https://bitbucket.org/Mattrixwv/pyClasses
 """
@@ -23,7 +23,6 @@
 
 
 from Problems.Problem import Problem
-from Stopwatch import Stopwatch
 from Unsolved import Unsolved
 
 
@@ -60,17 +59,21 @@ class Problem31(Problem):
 		#Stop the timer
 		self.timer.stop()
 
-		#Save the results
-		self.result = "There are " + str(self.permutations) + " ways to make 2 pounds with the given denominations of coins"
-
 		#Throw a flag to show the problem is solved
 		self.solved = True
+
 	#Reset the problem so it can be run again
 	def reset(self):
 		super().reset()
 		self.permutations = 0
 
 	#Gets
+	#Returns the result of solving the problem
+	def getResult(self):
+		#If the problem hasn't been solved throw an exception
+		if(not self.solved):
+			raise Unsolved("You must solve the problem before you can see the result")
+		return f"There are {self.permutations} ways to make 2 pounds with the given denominations of coins"
 	#Returns the number of correct permutations of the coins
 	def getPermutations(self) -> int:
 		#If the problem hasn't been solved throw an exception
@@ -79,16 +82,6 @@ class Problem31(Problem):
 		return self.permutations
 
 
-#This calls the appropriate functions if the script is called stand alone
-if __name__ == "__main__":
-	problem = Problem31()
-	print(problem.getDescription())	#Print the description
-	problem.solve()		#Call the function that answers the problem
-	#Print the results
-	print(problem.getResult())
-	print("It took " + problem.getTime() + " to solve this algorithm")
-
-
 """ Results:
 There are 73682 ways to make 2 pounds with the given denominations of coins
 It took an average of 5.519 milliseconds to run this problem through 100 iterations