Python bytes to geojson Point - mysql

Question

I have a MySQL database where I have Point type location data and a Django (Django Rest Framework) backend where I am trying to retrieve that data. If I try to get that location data from phpMyAdmin the returned location is something like this POINT(23.89826 90.267535). In my Django backend however, I get a bytes as the returned location. The returned value is something like this
b'\x00\x00\x00\x00\x01\x01\x00\x00\x00\x12N\x0b^\xf4\xe57#C\xe2\x1eK\x1f\x91V#'
The database uses utf8mb4_unicode_ci collation.
If I try to convert the returned bytes to a string with .decode('utf-8') I get UnicodeDecodeError
>>> s = b'\x00\x00\x00\x00\x01\x01\x00\x00\x00\x12N\x0b^\xf4\xe57#C\xe2\x1eK\x1f\x91V#'
>>> s.decode('utf-8')
Traceback (most recent call last):
File "<console>", line 1, in <module>
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf4 in position 13: invalid continuation byte
I get the same bytes array even if I perform a raw query from Django with the MySQL function St_AsGeoJson(location).
I then tried geojson. When I feed that bytes to geojson.Point() I get a geojson back but instead of 2 floats the coordinates array consists 25 integer values.
>>> s = b'\x00\x00\x00\x00\x01\x01\x00\x00\x00\x12N\x0b^\xf4\xe57#C\xe2\x1eK\x1f\x91V#'
>>> geojson.Point(s)
{"coordinates": [0, 0, 0, 0, 1, 1, 0, 0, 0, 18, 78, 11, 94, 244, 229, 55, 64, 67, 226, 30, 75, 31, 145, 86, 64], "type": "Point"}
How can I retrieve the Point data from the bytes or this geojson?

Answer 1

I had this problem because I was using plain Django and Django models doesn't have a field type that deals with Geo data. I was using a CharField with a max_length=255 and then tried to parse whatever that CharField retrieved from the database. I have solved the problem by using GeoDjango and Django REST Framework GIS. Django REST Framework GIS is not necessary. I used it because I am using Django REST Framework and it outputs the Geo data in a nice format.
Steps were to
Install GDAL(Geospatial Data Abstraction Library)
sudo apt-get install gdal-bin
sudo apt-get install python3-gdal
Add django.contrib.gis and rest_framework_gis to settings.INSTALLED_APPS
Set GDAL_LIBRARY_PATH in settings, in my case it's GDAL_LIBRARY_PATH = os.getenv('GDAL_LIBRARY_PATH')
Update model import from from django.db import models to from django.contrib.gis.db import models
Update the model to use a Geo field. More: https://docs.djangoproject.com/en/2.1/ref/contrib/gis/model-api/
Links
https://docs.djangoproject.com/en/2.1/ref/contrib/gis/
https://github.com/djangonauts/django-rest-framework-gis
https://github.com/domlysz/BlenderGIS/wiki/How-to-install-GDAL