sum function sum in python

sum is a very practical function in python, but you must pay attention to its use. The first time I used it, I used it like this:

s = sum(1,2,3)

The result was tragic La

In fact, the parameter of sum() is a list

For example:

sum([1,2,3])

sum(range(1,11))

There is also a more interesting usage

a = range(1,11)

b = range(1,10)

c = sum([item for item in a if item in b])

print c

Output:

45