CODEWITHSUNDEEP
pythonpython-3.xdictionary
shar
shar

Reputation: 2088

Python - Creating a list of dictionaries

I wanted to create a list of dictionaries in python. The usual way of creating a list worked for me. That is mylist = [{1:1},{2:2}]

However, when I tried creating it using a comprehension over range() function, mylist = [a:a for a in range(10)] I get syntax error.

But to my surprise, if I construct a set in the same manner, it works as expected. myset = {a:a for a in range(10)}

May I know why this is so? I am using Python3

Upvotes: 2

Views: 154

Answers (2)

Saulius Žemaitaitis
Saulius Žemaitaitis

Reputation: 2974

You're missing a dictionary creation in your list comprehension:

mylist = [{a:a} for a in range(10)]

Upvotes: 3

Marcin
Marcin

Reputation: 238957

I think you want something like this:

mylist = [{a:a} for a in range(10)]

You forgot about { and }.

In the second example, your myset is a dict, not a set:

In [8]: type(myset)
Out[8]: dict

In this example, { and } denote dictionary comprehension, not set comprehension.

Upvotes: 6

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