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TypeError: can't multiply sequence by non-int of type 'str' - emmapaw24 - Feb-03-2020
Hi, I'm new to python so the answer to this may be obvious, but I'm trying to write code to find the cost of electricity used by a device using wattage, the number of hours used, and electricity cost. The code I've written is:
wattage = input("What is the wattage of your device?")
hoursUsed = input("What is the amount of hours used?")
pricePerKWh = 11.76
electricityCost = ((wattage * hoursUsed)/(1000 * pricePerKWh))
print("The cost of electricity is:" + str(electricityCost))
When I run this is recieve:
What is the wattage of your device?3
What is the amount of hours used?3
Traceback (most recent call last):
File "C:/Users/Windows/Documents/lab3.py", line 4, in <module>
electricityCost = ((wattage * hoursUsed)/(1000 * pricePerKWh))
TypeError: can't multiply sequence by non-int of type 'str'
>>>
I can't figure out what I'm doing wrong in the code, again this might be obvious but I'm new to this, thanks in advance.
RE: TypeError: can't multiply sequence by non-int of type 'str' - ndc85430 - Feb-03-2020
The
input function returns a string, so you need to convert those values to numeric ones, using the int or float functions as appropriate.
RE: TypeError: can't multiply sequence by non-int of type 'str' - michael1789 - Feb-03-2020
There are different "types" of information in python. "int" refers to "integer", and "str" refers to "string". You inputs collect a "string", which is just a series of characters, could be letters or numbers and has no mathematical value. If you want to do math with a string you need to convert it to a number-type variable first.
#here is one way electricityCost = ((wattage * int(hoursUsed))/(1000 * int(pricePerKWh)))