@KenBuja That return Concatenate made me think python MUST have something similar and sure enough... thank you for that:
test = "1,2,2,1,3,3,3,3,4,5,1,5,10"
test2 = []
for x in test.split(","):
test2.append(x)
myset = sorted(set(test2),key=int)
test = ','.join(myset)
print(test)
#returns 1,2,3,4,5,10
#String on numbers sorted as numbers