How do I access a POST endpoint from a Django view?

Question

I need to provide a service that requests a Django view method using lib requests. The method is as follows::

def classify(request):                                    

    print(request)

    if request.method == "POST":                          
        form = DocumentForm(request.POST, request.FILES)  

        if form.is_valid():                               
            clf = Classifying()                           
            file = request.FILES['file']                  
            file_name = str(file.name)                    
            predict = str(clf.predict(file))                                      

            response = {                                      
                'predict': predict,                           
                'document': file_name,                        
                'run': True                                   
            }                                                 

         data = json.dumps(response, cls=DjangoJSONEncoder)
         return HttpResponse(data)                         

return HttpResponse({})

At the moment, the method captures a request file, but this will be modified later. The objective of this method is to take a text, classify and return the classification (1 or 0, in this case). I made a simple form with html to test this method and it works. But when I used lib requests did not work. This method is not even called (I put the print above to check if it would at least print the content of the request). Code:

r = requests.post('http://127.0.0.1:8000/classify', data={'text': 'Excelentissimo Juíz...'})
print(r.url)

The answer from the print is Response [500]. How can I fix this?