NameError: name 'print_string' is not defined

[jamie_01]

def ground_shipping_cost(weight):
  if (weight <= 2): # 2 pounds or less
    price = 1.50
  elif (weight > 2) or (weight <= 6):
    price = 3.00
  elif (weight > 6) or (weight <= 10):
    price = 4.00
  elif (weight > 10):
      price = 4.75

  cost = ((weight * price) + 20)

  return cost

def drone_shipping_cost(weight):

  if (weight < 2):
    price = 4.50
  elif (weight > 2) or (weight <= 6):
    price = 9.00
  elif (weight > 6) or (weight <= 10):
    price = 12
  elif (weight > 10):
    price = 14.25

  return price

premium_ground_shipping = 125.00

def cheapest_shipping (weight):
  if drone_shipping_cost(weight) < ground_shipping_cost (weight):  
    ret = drone_shipping_cost(weight)
    ship_method = 1 # "ground shipping"
  elif ground_shipping_cost (weight) < drone_shipping_cost(weight):
    ret = ground_shipping_cost (weight)
    ship_method = 2 # "drone shipping"
  else:
    ret = premium_ground_shipping
    ship_method = 3 # "premium shipping

    return ret

  if (ship_method == 1):
    print_string == "ground_shipping"
  elif (ship_method == 2):
    print_string == "drone shipping"
  elif(ship_method == 3):
    print_string == "premium shipping"

  ship_price = cheapest_shipping (4.8) # input weight to calculate

t_string = "You should ship using: " + str(print_string) + " it will cost " + str(ship_price)

print(t_string)

please can someone fix this line

t_string = "You should ship using: " + str(print_string) + " it will cost " + str(ship_price)

I'm a noob coming from C and would like this script to work. I see that the str() function is working for the str(ship_price) successfully because I have used it for the cheapest_shipping (4.8) function, how do I get around doing that. Thanks!

[deanhystad]

"==" is the equality comparison, "=" is assignment.

print_string == "ground_shipping" compares the two and evaluates to True or False, it does not set the value of print_string.

print_string = "ground shipping"
if print_string == "ground shipping":
    print("Using ground shipping")

[buran]

check line 41, do you really want the return statement at that place in the function and with that indentation? what will happen if the else block is executed? print_string has local scope - it exists only inside the function and is not accessible outside it. Do you want lines 43-48 inside the function. If it should be outside - ship_method (local scope inside the function) will not be accessible and will cause NameError
Note that there is a LOT of redundant code...