finitefunc

A function whose domain is a finite set can be implemented using a Python dictionary. Let D be such a Python dictionary corresponding to the mathematical function $f\colon X\to Y$, where $X$ is a finite set. The value of $f$ at x is D[x], and the domain $X$ is the set of all keys of D. Return the range $\{f(x):x\in X\}$ as a Python set.

Write a function finitefunc.

• Input parameter: a dict object D
  • D has at most 1000 keys.
  • Every key and value of D is an int object whose absolute value is at most $1000$.
• Return value: a set object S representing the range of the function
  • Every element of S is an int object.