# 20.181:sadEvoModel

### From OpenWetWare

the code below returns 0.9 if x and y are the same; 0.1 if they're different, regardless of branch lengths. use this function if you can't derive the Jukes-Cantor model and would like to move on to the next portion of the assignment.

def evoModel_Sad(x,y,distance):

- if x == y:

- return 0.9
- return 0.1