dictionary of dictionary in python

Question

tags = {'stream', 'auth'} 
tags['stream']= {}
tags["stream"]["path"]= ["/streams"]
tags['stream']['attribute']= ['id', 'secure', 'cpcode', 'format', 'event_pattern']

The above code throws an error:

    tags["stream"]= {} 
TypeError: 'set' object does not support item assignment

How to create a dictionary of dictionary of list?

Martijn Pieters · Accepted Answer · 2013-11-22 12:41:30Z

5

You created a set, not a dictionary. You need to specify key-value pairs:

tags = {'stream': None, 'auth': None}

or specify the nested dictionary in literal notation in-place:

tags = {
    'stream': {
        'path': ["/streams"],
        'attribute': ['id', 'secure', 'cpcode', 'format', 'event_pattern'],
    }, 
    'auth': None,
}

The {value, value, value} syntax (no keys) is the set literal notation.

answered Nov 22, 2013 at 12:41

Martijn Pieters

1.1m326 gold badges4.2k silver badges3.4k bronze badges

Sign up to request clarification or add additional context in comments.

Comments

falsetru · Accepted Answer · 2013-11-22 12:41:34Z

4

{'stream', 'auth'} is a set literal, not a dictionary.

Use a dictionary literal:

tags = {'stream': {}, 'auth': {}}
tags["stream"]["path"]= ["/streams"]
tags['stream']['attribute']= ['id', 'secure', 'cpcode', 'format', 'event_pattern']

>>> type({'stream', 'auth'})
<type 'set'>
>>> type({'stream': {}, 'auth': {}})
<type 'dict'>
>>>

answered Nov 22, 2013 at 12:41

falsetru

371k69 gold badges769 silver badges659 bronze badges

Collectives™ on Stack Overflow

dictionary of dictionary in python

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related