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C # tutorial
Learn how to remove duplicates from a List in Python
First we have a List that contains duplicates:
mylist = ["a", "b", "a", "c", "c"]
mylist = list(dict.fromkeys(mylist))
print(mylist)
Create a dictionary, using the List items as keys. This will automatically remove any duplicates because dictionaries cannot have duplicate keys.
mylist = ["a", "b", "a", "c", "c"]
mylist = list(dict.fromkeys(mylist))
print(mylist)
Then, convert the dictionary back into a list:
mylist = ["a", "b", "a", "c", "c"]
mylist = list(dict.fromkeys(mylist))
print(mylist)
Now we have a List without any duplicates, and it has the same order as the original List.
Print the List to demonstrate the result
mylist = ["a", "b", "a", "c", "c"]
mylist = list(dict.fromkeys(mylist))
print(mylist)
If you like to have a function where you can send your lists, and get them back without duplicates, you can create a function and insert the code from the example above.
def my_function(x):
return list(dict.fromkeys(x))
mylist =
my_function(["a", "b", "a", "c", "c"])
print(mylist)
Create a function that takes a List as an argument.
def my_function(x):
return list(dict.fromkeys(x))
mylist =
my_function(["a", "b", "a", "c", "c"])
print(mylist)
Create a dictionary, using this List items as keys.
def my_function(x):
return list(dict.fromkeys(x))
mylist =
my_function(["a", "b", "a", "c", "c"])
print(mylist)
Convert the dictionary into a list.
def my_function(x):
return list(dict.fromkeys(x))
mylist =
my_function(["a", "b", "a", "c", "c"])
print(mylist)
Return the list
def my_function(x):
return list(dict.fromkeys(x))
mylist =
my_function(["a", "b", "a", "c", "c"])
print(mylist)
Call the function, with a list as a parameter:
def my_function(x):
return list(dict.fromkeys(x))
mylist = my_function(["a", "b", "a", "c", "c"])
print(mylist)
Print the result:
def my_function(x):
return list(dict.fromkeys(x))
mylist = my_function(["a", "b", "a", "c", "c"])
print(mylist)