Define and use in your program the following functions to make your code more modular: convert_str_to_numeric_list - takes an input string, splits it into tokens, and returns the tokens stored in a list only if all tokens were numeric; otherwise, returns an empty list. get_avg - if the input list is not empty and stores only numerical values, returns the average value of the elements; otherwise, returns None. get_min - if the input list is not empty and stores only numerical values, returns the minimum value in the list; otherwise, returns None. get_max - if the input list is not empty and stores only numerical values, returns the maximum value in the list; otherwise, returns None.

In Python:

def convert_str_to_numeric_list(teststr):

   nums = []

   res = teststr.split()

   for x in res:

       if x.isdecimal():

           nums.append(int(x))

       else:

           nums = []

           break;

   return nums

def get_avg(mylist):

   if not len(mylist) == 0:

       total = 0

       for i in mylist:

           total+=i

       ave = total/len(mylist)

   else:

       ave = "None"

   return ave

def get_min(mylist):

   if not len(mylist) == 0:

       minm = min(mylist)

   else:

       minm = "None"

   return minm

def get_max(mylist):

   if not len(mylist) == 0:

       maxm = max(mylist)

   else:

       maxm = "None"

   return maxm

mystr = input("Enter a string: ")

mylist = convert_str_to_numeric_list(mystr)

print("List: "+str(mylist))

print("Average: "+str(get_avg(mylist)))

print("Minimum: "+str(get_min(mylist)))

print("Maximum: "+str(get_max(mylist)))

Explanation:

See attachment for complete program where I use comment for line by line explanation