I have a dictionary and some of my keys have multiple of the same value, how do I remove the repeat-CodePudding

I want 'to': ['learn', 'have', 'make'] I keep getting 'to': ['learn', 'have', 'learn', 'make']

CodePudding user response：

METHOD 1:

Here's the beginners, easy to get (probably inefficient) code:

dic = {'to': ['have', 'learn', 'learn', 'make']}
print(dic)
for i in dic['to']:
    for j in dic['to'][dic['to'].index(i)   1:]:
        if i == j:
            dic['to'].remove(j)
print(dic)


# OUTPUT:


# {'to': ['have', 'learn', 'learn', 'make']}
# {'to': ['have', 'learn', 'make']}

It works by checking all elements after an element, for every element in the list.

METHOD 2:

Using OrderedDict from collections (one liner):

from collections import OrderedDict
dic = {'to':['learn', 'have', 'make', 'learn']}
print(dic)
dic['to'] = list(OrderedDict.fromkeys(dic['to']))
print(dic)


#SAME OUTPUT AS BEFORE

CodePudding user response：

You can simply convert your list to a set and back to list.

x = {'to': ['learn', 'have', 'learn', 'make']}

for key, value in x.items():
    x[key] = list(set(value))

Output:

{'to': ['learn', 'have', 'make']}

Set is a collection of unique elements. So passing your list to set() function returns a set of unique elements of that list, which you can then pass onto the list() function, to get the list back.