how to eliminate repetitive in puthon list code example

Example 1: python remove duplicates from a list

# HOW TO REMOVE DUPLICATES FROM A LIST:
# 1) CREATE A LIST
my_list = [1, 2, 3, 4, 5, 5, 5, 1]
# 2) CONVERT IT TO A SET AND THEN BACK INTO A LIST
my_list = list(set(my_list))
# 3) DONE! 
print(my_list) #WILL PRINT: [1, 2, 3, 4, 5]

Example 2: python remove repeated elements from list

# ----- Create a list with no repeating elements ------ #

mylist = [67, 7, 89, 7, 2, 7]
newlist = []

  for i in mylist: 
    if i not in newlist: 
        newlist.append(i)