CODEWITHSUNDEEP
jsongensimserializable
Gaurav Pandey
Gaurav Pandey

Reputation: 91

TypeError: Object of type 'complex' is not JSON serializable while using pyLDAvis.display() function

I have a document Term matrix with nine documents:

enter image description here

I am running the code as below:

import pyLDAvis.gensim
topicData = pyLDAvis.gensim.prepare(ldamodel, docTermMatrix, dictionary)
pyLDAvis.display(topicData)

I am getting the below error when executing pyLDAvis.display function:

TypeError: Object of type 'complex' is not JSON serializable

Can someone guide here? What could be the reason?

Upvotes: 9

Views: 11000

Answers (3)

FEZAI Mohamed
FEZAI Mohamed

Reputation: 11

add this to your pyldavis/utils.py (NumPyEncoder)

if np.iscomplexobj(obj):
            return abs(obj)

class NumPyEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, np.int64) or isinstance(obj, np.int32):
            return int(obj)
        if isinstance(obj, np.float64) or isinstance(obj, np.float32):
            return float(obj)
        if np.iscomplexobj(obj):
            return abs(obj)
        return json.JSONEncoder.default(self, obj)

#resolved my issue

Upvotes: 1

birdsarah
birdsarah

Reputation: 1165

I had the same problem. Following the GH issue referenced by user3411846 I found a different, simpler solution.

The complex number had come from coordinate calculation and specifying the "mds" worked.

https://github.com/bmabey/pyLDAvis/issues/69#issuecomment-311337191

So your code would be

topicData = pyLDAvis.gensim.prepare(ldamodel, docTermMatrix, dictionary, mds='mmds')

Other options for mds are here: https://pyldavis.readthedocs.io/en/latest/modules/API.html#pyLDAvis.prepare

Upvotes: 13

user3411846
user3411846

Reputation: 248

Add this line of code to your pyLDAvis pyLDAvis/utils.py

    if np.iscomplexobj(obj):
        return abs(obj)

This error has been reported in GitHub GitHub Issue

Upvotes: 4

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