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I am required to use the sum() function in order to sum the values in a list. Please note that this is DISTINCT from using a for loop to add the numbers manually. I thought it would be something simple like the following, but I receive TypeError: 'int' object is not callable.
numbers = [1, 2, 3]
numsum = (sum(numbers))
print(numsum)
I looked at a few other solutions that involved setting the start parameter, defining a map, or including for syntax within sum(), but I haven't had any luck with these variations, and can't figure out what's going on. Could someone provide me with the simplest possible example of sum() that will sum a list, and provide an explanation for why it is done the way it is?
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Python provides an inbuilt function sum() which sums up the numbers in the list. Syntax: sum(iterable, start) iterable : iterable can be anything list , tuples or dictionaries , but most importantly it should be numbers. start : this start is added to the sum of numbers in the iterable.
Python's built-in function sum() is an efficient and Pythonic way to sum a list of numeric values. Adding several numbers together is a common intermediate step in many computations, so sum() is a pretty handy tool for a Python programmer.
Python sum() Function The sum() function returns a number, the sum of all items in an iterable.
Have you used the variable sum anywhere else? That would explain it.
>>> sum = 1
>>> numbers = [1, 2, 3]
>>> numsum = (sum(numbers))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'int' object is not callable
The name sum doesn't point to the function anymore now, it points to an integer.
Solution: Don't call your variable sum, call it total or something similar.
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