Ex 14 List Remove Duplicates.py

Ex 14 List Remove Duplicates.py

# -*- coding: utf-8 -*-
"""
Write a program (function!) that takes a list and returns a new list that 
contains all the elements of the first list minus all the duplicates.

Extras:

Write two different functions to do this - one using a loop and constructing a 
list, and another using sets.
Go back and do Exercise 5 using sets, and write the solution for that in a 
different function.
"""

import random as rd

randlist = []

def build_list():
    global randlist
    while len(randlist) < 10:
        randlist.append(rd.randrange(8))
    return randlist
        
def remove_dupes():
    global randlist
    nodupes = list(set(randlist))
    return nodupes

def only_dupes():
    global randlist
    newlist = list(set([item for item in randlist if randlist.count(item) > 1]))
    return newlist
    
print("Raw list: {}".format(build_list()))
print("List with duplicates removed: {}".format(remove_dupes()))
print("Duplicated numbers in list: {}".format(only_dupes()))