More elegant way to do this (Python)? [duplicate]

This question already has an answer here:

• Replacements for switch statement in Python? 48 answers

if key == '1':
    key = opt1
if key == '2':
    key = opt2
if key == '3':
    key = opt3
if key == '4':
    key = opt4
if key == '5':
    key = opt5
if key == '6':
    key = opt6
if key == '7':
    key = opt7
if key == '8':
    key = opt8
if key == '0':
    key = opt0
if key == '':
    key = '-'

It looks terrible!! Is there a more elegant way to achieve the same result? Thanks in advance <3