Can't call function properly in python due to unknown reasons -

after compilation error:

traceback (most recent call last):     file "python", line 29, in <module>     file "python", line 26, in trip_cost     typeerror: 'int' object not callable 

the following code expenditure calculation application wrote. there 4 arguments passing inside trip_cost function in end 4 parameters defined in function definition.

def hotel_cost(nights):     return 140 * nights def spending_money(money):     return money def plane_ride_cost(city):     if city == "charlotte":        return 183     elif city == "tampa":         return 220     elif city == "pittsburgh":         return 222     elif city == "losangeles":         return 475 def rental_car_cost(days):     cost = 40      if days >= 7:         return (cost * days - 50)     elif days >= 3 < 7:         return (cost * days - 20)     elif days < 3:         return (cost * days) def trip_cost(city,days,spending_money):     total_trip_cost = plane_ride_cost(city) + rental_car_cost(days) + hotel_cost(days) + spending_money(spending_money)     return total_trip_cost  print trip_cost("losangeles",5,600) 

your local variable spending_money over-writing function spending_money() in trip_cost function's scope.

since spending_money() function doesn't anything, add directly.