Proper POST file upload (load testing with Locust)

Well, I found the solution and I hope it will be useful for someone:

Here was described how Django handles file:How to send a "multipart/form-data" with requests in python?

And recipe is to define 'files' param in post function:

    r = self.client.post("/submit/", data={        'csrfmiddlewaretoken': csrftoken,        'password': smart_str(u'wkefjgui'),        'payload': smart_str(u'kjsdgfljdsh'),        'commit': smart_str(u'Вкрапить / Embed'),         }, files={'docfile': attach})

handle multipart file

 def _get_image_part(self, file_path, file_content_type='image/jpeg'):        import os        file_name = os.path.basename(file_path)        file_content = open(file_path, 'rb')        return file_name, file_content, file_content_type

multipart test case

class OpenDeviceFrontApi(TaskSet):    @task(2)    def rec_log_upload(self):        payload = {            "device_key": device_key        }        files = {            "scene_img": self._get_image_part("data/face/rec1.jpg"),            "face_img": self._get_image_part("data/face/rec2.jpg")        }        r = self.client.post("/log/rec_log_upload", data=payload, files=files, verify=False)        assert r.status_code == 200        rData = json.loads(r.text, encoding="utf-8")

How to test a file upload in Locust over Django Server:

def post_img(self):    files = {'media': open('img.png', 'rb')}    response=self.client.post("/upload",files=files)    print('Response is -: ',response)