'int' object is not callable when using the sum function on a list
list, python
Solution
You no doubt used the identifier `sum` previously in your code as a local variable name, and the last value you bound to it was an `int`. So, in that code snippet, you're trying to call the `int`. `print sum` just before you try calling it and you'll see, but code inspection will probably reveal it faster.
This kind of problem is why expert Pythonistas keep telling newbies over and over "don't use builtin names for your own variables!" even when it's apparently not hurting a specific code snippet: it's a horrible habit, and a bug just waiting to happen, if you use identifiers such as `sum`, `file`, `list`, etc, as your own variables or functions!-)
Problem
``` coinCount = [2 for i in range(4)] total = sum(coinCount) ``` This gives me ``` TypeError: 'int' object is not callable ``` I don't understand why because ``` print type(coinCount) ``` Gives me ``` type <'list'> ```