Python exception...

With this code:

class Dictops():

def  __init__(self,indict):
self.xdict=dict()
self.xdict.update(indict)

def keyvalsearch(self,key):
# write your code here

Resolve on the code above:

Given the class definition Dictops, complete the method named keyvalsearch that, given an input key, will search the object attribute edict for the associated value.

1- A KeyError exception handler should return a value of float('Nan').

2- Otherwise, the function should return the value associated with the input key.