Array Numbers

Question

I am new to Python.

On this site, they show how to summarize a list of integers.

What to do if instead of the list of source ints you had a list

class Number : def __init__( self, x = 0) : self.number = x def getNumber( self ) : return self.number 

What is Python code to sum self.number in an array over multiple lines (hopefully)?

Answer 1

I assume you mean a list, or perhaps another type of iteration:

sum(x.getNumber() for x in L)

Answer 2

Try the following:

 sum(x.getNumber() for x in l) 

By the way, [1, 2, 3] is a list, not an array.

Answer 3

Use a generator or list:

 numbers = [Number(1), Number(2)] sum(n.getNumber() for n in numbers) 

It just calls the getNumber() method for each item before adding up.

Answer 4

Here are some ways to do this:

 sum( e.getNumber() for e in L ) sum( e.number for e in L ) reduce( lambda a,b: a + b.getNumber(), L, 0 ) # likewise for e.number