Python3 toggle between two strings

Question

Is there a more elegant way to toggle between two strings or integers in Python 3?

x={"A":"B", "B":"A"}[x]

The values can be non-boolean, like string or integer. Let's suppose that we want to toggle between "A" and "B" and the variable name is x.

In other words: if x = "A" then the result should be x = "B" and if x = "B" then the result should be x = "A".

input:

x="B"

output:

x="A"

Answer 1

Using a dict is already pretty smart. Here is an alternative:

x = 'B' if x == 'A' else 'A'

Answer 2

You can write something like that:

def toggle(x):
    x['A'], x['B'] = x['B'], x['A']

x = {'A': 'B', 'B': 'A'}

or that:

def toggle(x):
    x.update(dict(zip(x.keys(), list(x.values())[::-1])))

x = {'A': 'B', 'B': 'A'}

print(x)
toggle(x)
print(x)
toggle(x)
print(x)

OUTPUT:

{'A': 'B', 'B': 'A'}
{'A': 'A', 'B': 'B'}
{'A': 'B', 'B': 'A'}