How can I break a line of very long nested dictionaries?

Question

if details['box'] == {} or details['box'][last_box_key].get('timeout', datetime.min) < datetime.now():

I tried putting brackets around the dict but I cant seem to break this really long line.

Does this answer your question? [Styling multi-line conditions in 'if' statements?](https://stackoverflow.com/questions/181530/styling-multi-line-conditions-in-if-statements) — tevemadar, Apr 19 '20 at 09:44

score 0 · Answer 1 · answered Apr 19 '20 at 09:46

0

You can break the line up using backslashes.

if details['box'] == {} or \
    details['box'][last_box_key].get('timeout', datetime.min) \
        < datetime.now():

answered Apr 19 '20 at 09:46

Lemon.py

819
10
22

score 0 · Answer 2 · answered Apr 19 '20 at 10:01

Use black Python code formatter (note: by default, it formats in-place, i.e. mutates the file, use --diff flag to make it just output the changes). Running black test.py formats your code to:

if (
    details["box"] == {}
    or details["box"][last_box_key].get("timeout", datetime.min) < datetime.now()
):

By adding more keys, you may find out how black will split even longer line:

if (
    details["box"] == {}
    or details["box"][last_box_key][another_very_long_key][
        even_more_looooooong_key
    ].get("timeout", datetime.min)
    < datetime.now()
):

How can I break a line of very long nested dictionaries?

2 Answers2