Creating namedtuple instance from already set values

Question

I have a namedtuple like this

course_summary_struct = namedtuple(
                'CourseSummary',
                ['id', 'display_name', 'location', 'display_coursenum', 'display_organization']
)

I want to update the the namedtuple dynamically until I am sure it has all required information.

So i Update course_summary_struct with all the values in steps.

Now I am at a place where I need to create an instance from course_summary_struct like this

summery = course_summary_struct() #<===== Issue here

I want to fill summery with all the information in course_summary_struct.

How can I do that?

`tuples` are immutable, is there a reason you are using them?...why not `dict` ? — Iron Fist, Nov 20 '15 at 15:43

score 1 · Answer 1 · answered Nov 20 '15 at 11:47

1

Tuples are immutable and can not be changed after their creation.

You can use recordclass.recordclass.

answered Nov 20 '15 at 11:47

orlp

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score 1 · Accepted Answer · answered Nov 20 '15 at 13:10

Wait until you have all the necessary information before actually creating the named tuple instance.

data = {}
data['id'] = 3
# ...
data['display_name'] = 'Chem 101'
# ...
summary = course_summary_struct._make([data[x] for x in course_summary_struct._fields])

score 0 · Answer 3 · answered Aug 28 '17 at 09:37

If you have data in Dictionary you can do this way

course_summary_struct = namedtuple(
                'CourseSummary',
                ['id', 'display_name', 'location', 'display_coursenum', 'display_organization'])
# Your data
data = {
    'id': 1,
    'display_name': 'naren',
    'location': 'Bengaluru',
    'display_coursenum': 11,
    'display_organization': ':D'}

course_summary_struct(**data)

# Creates > CourseSummary(id=1, display_name='naren', location='Bengaluru', display_coursenum=11, display_organization=':D')

Or if you have other way use setattr

setattr(course_summary_struct, 'id', 11)

Creating namedtuple instance from already set values

3 Answers3