Why does the 'int' object is not callable error occur when using the sum() function?
I'm trying to figure out why I'm getting an error when using the sum function on a range.
Here is the code:
data1 = range(0, 1000, 3)
data2 = range(0, 1000, 5)
data3 = list(set(data1 + data2)) # makes new list without duplicates
total = sum(data3) # calculate sum of data3 list's elements
print total
And here is the error:
line 8, in <module> total2 = sum(data3)
TypeError: 'int' object is not callable
I found this explanation for the error:
In Python a "callable" is usually a function. The message means you are treating a number (an >"int") as if it were a function (a "callable"), so Python doesn't know what to do, so it >stops.
I've also read that sum() is capable of being used on lists, so I'm wondering what is going wrong here?
I just tried it in an IDLE module and it worked fine. However, it doesn't work in the python interpreter. Any ideas on how that can be?
Answer
This means that somewhere else in your code, you have something like:
sum = 0
Which shadows the builtin sum (which is callable) with an int (which isn't).