Python 4 Functions

def speak(message):
  return message

if happy():
  speak("I'm happy!")
elif sad():
  speak("I'm sad.")
else:
  speak("I don't know what I'm feeling.")

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import math   print math.sqrt(13689)

def is_numeric(num):
  return type(num) == int or type(num) == float:

max(2, 3, 4) # 4
min(2, 3, 4) # 2

abs(2) # 2
abs(-2) # 2

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def hotel_cost (nights):   return 140 * nights   def plane_ride_cost(city):   if city == "Charlotte":     return 183   elif city == "Tampa":     return 220   elif city == "Pittsburgh":     return 222   elif city == "Los Angeles":     return 475     def rental_car_cost(days):   cost = 40 * days   if days >= 7:     cost -= 50   elif days >= 3:     cost -= 20   return cost   def trip_cost(city, days, spending_money):   return hotel_cost(days - 1) + plane_ride_cost(city) + rental_car_cost(days) + spending_money   print trip_cost("Los Angeles", 5, 600)