Why does Pycharm's inspector complain about "d = {}"?

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Track title: CC B Schuberts Piano Sonata No 16 D

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Chapters
00:00 Question
01:26 Accepted answer (Score 266)
02:07 Answer 2 (Score 22)
02:29 Answer 3 (Score 11)
03:04 Answer 4 (Score 0)
03:50 Thank you

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Full question
https://stackoverflow.com/questions/8406...

Question links:
[differences between "d = dict()" and "d = {}"]: https://stackoverflow.com/questions/2745...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#python #pycharm

#avk47

ACCEPTED ANSWER

Score 269

What is the code following your dictionary declaration?

I think PyCharm will trigger the error if you have something like:

dic = {}
dic['aaa'] = 5

as you could have written

dic = {'aaa': 5}

Note: The fact that the error goes away if you use the function dict(). This doesn't necessarily mean that pycharm believes dict() is a literal. It could just mean that it doesn't complain about it:

dic = dict()
dic['aaa'] = 5

ANSWER 2

Score 23

This can be disabled in the Project Settings or Default Settings.

Navigate to Settings -> Inspections -> Python
Uncheck "Dictionary creation could be rewritten by dictionary literal"

ANSWER 3

Score 12

for those who like (just like me) to initialize dictionaries with single operation

d = {
  'a': 12,
  'b': 'foo',
  'c': 'bar'
}

instead of many lines like

d = dict()
d['a'] = 12
d['b'] = ....

in the end I ended up with this:

d = dict()
d.update({
  'a': 12,
  'b': 'foo',
  'c': 'bar'
})

Pycharm is not complaining on this

ANSWER 4

Score 0

mydict = {
  a: 5,
  b:z+c/2
}

The dictionary could have been created directly without initialising them first and then reassigning new values.