Casa Casa - 4 months ago 23
Python Question

How do you divide each element in a list by an int?

I just want to divide each element in a list by an int.

myList = [10,20,30,40,50,60,70,80,90]
myInt = 10
newList = myList/myInt


This is the error:

TypeError: unsupported operand type(s) for /: 'list' and 'int'


I understand why I am receiving this error. But I am frustrated that I can't find a solution.

Also tried:

newList = [ a/b for a, b in (myList,myInt)]


Error:

ValueError: too many values to unpack


Expected Result:

newList = [1,2,3,4,5,6,7,8,9]



EDIT:

The following code gives me my expected result:

newList = []
for x in myList:
newList.append(x/myInt)


But is there an easier/faster way to do this?

Answer

The idiomatic way would be to use list comprehension:

myList = [10,20,30,40,50,60,70,80,90]
myInt = 10
newList = [x / myInt for x in myList]

or, if you need to maintain the reference to the original list:

myList[:] = [x / myInt for x in myList]
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