namedtuple._replace() doesn't work as described in the documentation
I was having trouble implementing namedtuple._replace(), so I copied the code right off of the documentation:
Point = namedtuple('Point', 'x,y')
p = Point(x=11, y=22)
p._replace(x=33)
print p
and I got:
Point(x=11, y=22)
instead of:
Point(x=33, y=22)
as is shown in the doc.
I'm using Python 2.6 on Windows 7
What's going on?
Answer
Yes it does, it works exactly as documented.
._replace returns a new namedtuple, it does not modify the original, so you need to write this:
p = p._replace(x=33)
See here: somenamedtuple._replace(kwargs) for more information.