Using namedtuple._replace with a variable as a fieldname
namedtuple, python
Solution
Tuples are immutable, and so are NamedTuples. They are not supposed to be changed!
`this_prize._replace(choice = "Yay")` calls `_replace` with the keyword argument `"choice"`. It doesn't use `choice` as a variable and tries to replace a field by the name of `choice`.
`this_prize._replace(**{choice : "Yay"} )` would use whatever `choice` is as the fieldname
`_replace` returns a new NamedTuple. You need to reasign it: `this_prize = this_prize._replace(**{choice : "Yay"} )`
Simply use a dict or write a normal class instead!
Problem
Can I reference a namedtuple fieldame using a variable? ``` from collections import namedtuple import random Prize = namedtuple("Prize", ["left", "right"]) this_prize = Prize("FirstPrize", "SecondPrize") if random.random() > .5: choice = "left" else: choice = "right" #retrieve the value of "left" or "right" depending on the choice print "You won", getattr(this_prize,choice) #replace the value of "left" or "right" depending on the choice this_prize._replace(choice = "Yay") #this doesn't work print this_prize ```