Merging items in a list - Python

Question

Say I have a list in python, like such:

list=[1,2,3,4,5]

How would I merge the list so that it becomes:

list= [12345]

If anyone has a way to do this, it would be greatly appreciated!!

Answer 1

reduce(lambda x,y:10*x+y, [1,2,3,4,5])
# returns 12345