Sal's Shipping Project python

Language Help Python
1

https://www.codecademy.com/paths/data-science/tracks/dspath-functions-and-logic/modules/dspath-control-flow/projects/sals-shipping

For the project above, I have 2 questions:

  1. how do I code so my print function spits out a dollar amount for numerical data in my code below?
    ie. 125.00 prints to $125.00

  2. Can someone tell me why my data is printing NONE?
    What is spits out :
    53.6
    6.75
    Ground Shipping is Cheapest

34.4
None
38.0
None
9.0
None

def GS_weight_cost(weight):
if weight > 10.0:
return (20.00 + weight * 4.75)
elif (6.0 < weight <= 10.0):
return (20.00 + weight * 4.00)
elif (2.0 < weight <= 6.0):
return (20.00 + weight * 3.00)
else:
return(20.00 + weight * 1.50)

PS = 125.00

def DS_weight_cost(weight):
if weight > 10.0:
return (weight * 14.25)
elif (6.0 < weight <= 10.0):
return (weight * 12.00)
elif (2.0 < weight <= 6.0):
return (weight * 9.00)
else:
return(weight * 4.50)

def type(weight):
if (GS_weight_cost(weight) < DS_weight_cost(weight)) and (GS_weight_cost(weight) < 125.00):
return “Ground Shipping is Cheapest”
elif (DS_weight_cost(weight) < GS_weight_cost(weight)) and (DS_weight_cost(weight) < 125.00):
return “Drone Shipping is Cheapest”
else:
return “Premium Shipping is Cheapest”

def advise(weight):
if type(weight) == “Ground Shipping is Cheapest”:
return print(GS_weight_cost(weight))
elif type(weight) == “Drone Shipping is Cheapest”:
return print(DS_weight_cost(weight))
else:
return “Premium Shipping is Cheapest”

print (GS_weight_cost(8.4))
print (DS_weight_cost(1.5))
print(type(4.8))
print( )
print(advise(4.8))
print(advise(6))
print(advise(2))

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2

We can use formatting to print a character string representation…

>>> '$%.2f' % 12.345
'$12.35'
>>> '$%.2f' % 12.0000
'$12.00'
>>>

Or using the Pythonic approach…

>>> '{:.2f}'.format(12.345)
'12.35'
>>>

This is the answer to your other question. If you remove the print statement and just go with the return, it is printed at the caller. As it stands, the printing takes place before the return, and None is returned since print has no return.

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