TypeError: Object of type 'int32' is not JSON serializable

Question

I have to select those symptoms which is in the dictionary with the symptoms already posted.It works fine.But for some symptoms typeError is showing in command prompt and also all are getting printed in command prompt but not in html page. Here is my code

views.py

def predict(request):
sym=request.POST.getlist('symptoms[]')
sym=list(map(int,sym))
diseaseArray=[]
diseaseArray=np.array(diseaseArray,dtype=int)
dictArray=[]
for dicti in dictionary:
    if (set(sym)<= set(dicti['symptoms']) and len(sym)!= 0) or [x for x in sym if x in dicti['primary']]:
        diseaseArray=np.append(diseaseArray,dicti['primary'])
        diseaseArray=np.append(diseaseArray,dicti['symptoms'])
diseaseArray=list(set(diseaseArray))
print(diseaseArray)
for i in diseaseArray:
    if i not in sym:
        dict={'id':i}
        dictArray.append(dict)
        print(dictArray)
for j in dictArray:
    symptoms=Symptom.objects.get(syd=j['id'])
    j['name']=symptoms.symptoms
    print(j['name'])
print(len(dictArray))
return JsonResponse(dictArray,safe=False)

template

$('.js-example-basic-multiple').change(function(){
  $('#suggestion-list').html('');
  $('#suggestion').removeClass('invisible');

  $.ajax({
  url:"/predict",
  method:"post",
  data:{
    symptoms: $('.js-example-basic-multiple').val(),
  },
  success: function(data){

      data.forEach(function(disease){
      console.log(disease.name)
        $('#suggestion-list').append('<li>'+disease.name+'<li>')
        $('#suggestion-list').removeClass('invisible');
    });



  }

  });

Answer 1

The type of each element in diseaseArray is a np.int32 as defined by the line:

diseaseArray=np.array(diseaseArray,dtype=int)  # Elements are int32

int32 cannot be serialized to JSON by the JsonResponse being returned from the view.

To fix, convert the id value to a regular int:

def predict(request):
    ...
    for i in diseaseArray:
        if i not in sym:
            dict={'id': int(i)}  # Convert the id to a regular int
            dictArray.append(dict)
            print(dictArray)
    ...