Power button doesn't work is there a software fix?

Hi there so recently my MacBook Pro 2012's power button stopped working basically no matter how much I press on it has no response and it is quite frustrating to have to remove the battery connection and then connect charger to turn it on. If I accidentally shut it down. I have seen people fixing this problem by tearing down the keyboard and replacing with new components.

As I’m on a tight budget and don’t want to deal with tearing apart my laptop is there a software solution when I can assign any key on the keyboard to act as the power button? Just to clarify all of the keys work fine except the power button.

Thanks

its2009