str.format() with nested dictionary [duplicate]

Question

I want to use the str.format() method like this:

my_str = "Username: {username}, User data: {user_data.attribute}".format(**items)

And apply it to items as shown below:

items = {
    "username" : "Peter",
    "user_data" : {
         "attribute" : "foo"
    }}

Is this feasible, and if so, then how? If not, I'm interested in your recommended approach.

(you don't need to have Python in the title, the tag python automatically append "python" to the title) — user202729
– user202729, Commented Mar 2, 2018 at 13:48
@user202729 It does append the first tag to the title of the webpage (<TITLE> here </TITLE>) but doesn't append it the title of the question — Psytho
– Psytho, Commented Mar 2, 2018 at 13:50
@Psytho But still, it's not encouraged to tag in the title. Meta post. — user202729
– user202729, Commented Mar 2, 2018 at 13:50
... votes are weird. Sometimes dupes are downvoted and sometimes they are upvoted. — user202729
– user202729, Commented Mar 2, 2018 at 13:53

sacuL · Accepted Answer · 2018-03-02 13:52:09Z

27

Try it like this:

items = {'username': 'Peter', 'user_data': {'attribute': 'foo'}}

my_str = "Username: {username}, User data: {user_data[attribute]}".format(**items)

>>> my_str
'Username: Peter, User data: foo'

edited Mar 2, 2018 at 13:52

answered Mar 2, 2018 at 13:49

sacuL

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2 Comments

Konrad Over a year ago

Huh. That works. I didn't expect it to be that easy, many thanks! I hope the question will be helpful to somebody else.

Levi Over a year ago

@Konrad It was =)

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