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I'm doing an assignment for school, I'm up to a part where i have to have the 'User' input a list of integers, the program must then add the integers in the list together and return:
Total: $[sum of integers]
as of yet, i have
cost = input("Enter the expenses: ")
cost = int(cost)
total = sum(i)
print("Total: $" + i)
but it keeps returning the error:
Traceback (most recent call last):
File "C:\Python33\Did I Spend Too Much.py", line 2, in <module>
cost = int(cost)
ValueError: invalid literal for int() with base 10: '10 15 9 5 7'
Where '10 15 9 5 7' are the integers I entered in testing.
Any help with this would be greatly appreciated
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If you are a Python developer or learner then you may be familiar with numpy library. In this library, we have a similar object like list, which is known as array. But an array is different from a list. We can add any integer to each element in an array by using “+” operator. But we can’t do so with a list.
This Python tutorial will help you to understand how easily you can add a specific number to every element in a list. Let’s understand this with an example first then we will explain our code. This is an example of a list.
insert () is an inbuilt function in Python that inserts a given element at a given index in a list. index - the index at which the element has to be inserted. element - the element to be inserted in the list. This method does not return any value but it inserts the given element at the given index.
Here, case_numbers.append (case_number) statements add the elements to the list. While it's true that you can append values to a list by adding another list onto the end of it, you then need to assign the result to a variable. The existing list is not modified in-place. Like this: However, this is far from the best way to go about it.
cost = cost.split()
total = sum([ int(i) for i in cost ])
You have to parse the string. input returns you string as 10 15 9 5 7 so parse that string with (space) and you will get list of str. Convert list of str to int and do sum.
I can give you solution, but best way you tried your self as student. If got any problem, give comments.
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