# ----- 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)
import itertools
mylist = [{'x':2020 , 'y':20},{'x':2020 , 'y':30},{'x':2021 , 'y':10},{'x':2021 , 'y':5}]
mylist1=[]
for key, group in itertools.groupby(mylist,lambda x:x["x"]):
max_y=0
for thing in group:
max_y=max(max_y,thing["y"])
mylist1.append({"x":key,"y":max_y})
print(mylist1)
# set the dict to a tuple for hashability, then use {} for set literal and retrn each item to dict.
[dict(t) for t in {tuple(d.items()) for d in l}]
# using two maps()
list(map(lambda t: dict(t), set(list(map(lambda d: tuple(d.items()), l)))))