<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def choice(self,arr):
 """Uniform random selection of a member of an list :param arr: list you want to select an element from :type arr: list :return: one element from the list """

    ind = self.randint(0,len(arr)-1)
    return arr[ind]