How many callable functions does the class Int$\_$Set provide?

class Int$\_$Set$($object$)$:

def $\_\_$init$\_\_($self$)$:

self.vals$=[]$

def insert$($self$,$ e$)$:

if e not in self.vals:

self.vals.append$($e$)$

def remove$($self$,$ e$)$:

try:

self.vals.remove$($e$)$

except:

raise ValueError$(\text{'}$value not found'$)$

def get$\_$Members$($self$)$:

return self.vals$[$:$]$