How can I get the sum of all list[1] inside of list of lists items using python 3?

Question

I am trying to get the sum of x in this type of list: myList=[[y,x],[y,x],[y,x]

Here is my code I have been trying:

myLists = [['0.9999', '2423.99000000'], ['0.9998', '900.00000000'], ['0.9997', '4741.23000000'], ['0.9995', '6516.16000000'], ['0.9991', '10.01000000'], ['0.9990', '9800.00000000']]
if chckList(myLists):
    floatList = []
    listLength = len(acceptibleBids)

    acceptibleBids0 = list(map(float, acceptibleBids[0]))
    acceptibleBids1 = list(map(float, acceptibleBids[1]))

    floatList.append(acceptibleBids0)
    floatList.append(acceptibleBids1)

    sumAmounts = sum(amount[1] for amount in floatList)
    print(sumAmounts)
    print(acceptibleBids)

I have run into many problems, but my current problem are listed below:
1. This list is the way I receive it, so the fact that they are all strings I have been trying to change them to floats so that I can the the sum(myList[1]) of each list inside myList.
2. The list ranges from 1 to 100

Answer 1

You can use list comprehension :

total = sum([float(x[1]) for x in myLists])
print(total) # 24391.39

Answer 2

The following will do:

>>> sum([float(x[0]) for x in myLists])
5.997

Answer 3

This should do:

sum = 0
for pair in myLists:
    sum+= float(pair[1])

#of course, if there is something that can't
#be a float there, it'll raise an error, so
#do make all the checks you need to make

I'm unsure where acceptibleBids comes from in that code, but I'll assume it is a copy of myList , or something similar to it. The problem with your code is that acceptibleBids[0] is just ['0.9999', '2423.99000000'] . Similarly, acceptibleBids[1] is just ['0.9998', '900.00000000'] . So when end up with acceptibleBids0 as [[0.9999, 2423.99000000]] and acceptibleBids1 is similarly wrong. Then this makes floatList not be what you wanted it to be.

Edit: list comprehension works too, but I kinda like this way of looking at it. Either way, with list comprehension this would be sum_floats = sum(float([pair[1]) for pair in myLists]) .