How do I convert a list to a dictionary?

Question

For example, how do I convert:
['cats', 'dogs', 'cats', 'rats'] to
{'cats': 2, 'dogs': 1, 'rats': 1}

Answer 1

a = ['cats', 'dogs', 'cats', 'rats']
b = {
animal: a.count(animal)
for animal in set(a)
}

Answer 2

You will have to use list comprehension, whereby you will be having both the key and values in the list

Answer 3

My post corrected..
import collections
mylist = ['cats', 'dogs', 'cats', 'rats']
b = dict(collections.Counter(mylist).most_common())
print(b)

Answer 4

Thanks guys.