add python to state machine

Author: Bimo

puzzles/state_machines/python/coin_state_machine.py

@@ -0,0 +1,32 @@
+"""
+  Imagine a machine that gives you a quarter once you put in 25 cents. I suppose if you really like
+  gumballs that is in someway useful. The machine will wait until it has reached a state of 25 cents, 
+  then it will spit out a quarter. The machine is totally oblivious to what coins were added to reach
+  its current state, all it knows is the state it is in, which is how it achieves the "no memory" standard.
+  (at least conceptually)
+ """
+from enum import Enum
+
+class coins(Enum):
+    penny = 1
+    nickel = 5
+    dime = 10
+    quarter = 25
+
+
+def main():
+    state = 0
+
+    while state <= 25:
+
+        print(f"Balance: {state}")
+        coin = input("Please insert a coin(penny, nickel, dime, quarter): ")
+        try:
+            state+=coins[coin].value
+        except:
+            print("That's not a coin")
+            continue
+
+    print("Thanks, here's your quarter")
+
+main()