In [23]: user.primary_image = image_url

In [24]: user.save()

In [25]: r = requests.get(image_url)

In [26]: img_temp = NamedTemporaryFile(delete=True)

In [27]: img_temp.write(r.content)
Out[27]: 8204

In [28]: img_temp.flush()

In [29]: user.primary_image.save("image.jpg", File(img_temp), save=True)
> /home/jim/Desktop/pyco/test/app/user/models/user.py(25)upload_image_to()
-> mime_type = imghdr.what(instance.primary_image)
(Pdb) c
---------------------------------------------------------------------------
ClientError                               Traceback (most recent call last)
~/Desktop/pyco/test/env/lib/python3.6/site-packages/storages/backends/s3boto3.py in _open(self, name, mode)
    409         try:
--> 410             f = S3Boto3StorageFile(name, mode, self)
    411         except ClientError as err:

~/Desktop/pyco/test/env/lib/python3.6/site-packages/storages/backends/s3boto3.py in __init__(self, name, mode, storage, buffer_size)
     68             # Force early RAII-style exception if object does not exist
---> 69             self.obj.load()
     70         self._is_dirty = False

~/Desktop/pyco/test/env/lib/python3.6/site-packages/boto3/resources/factory.py in do_action(self, *args, **kwargs)
    504             def do_action(self, *args, **kwargs):
--> 505                 response = action(self, *args, **kwargs)
    506                 self.meta.data = response

~/Desktop/pyco/test/env/lib/python3.6/site-packages/boto3/resources/action.py in __call__(self, parent, *args, **kwargs)
     82
---> 83         response = getattr(parent.meta.client, operation_name)(**params)
     84

~/Desktop/pyco/test/env/lib/python3.6/site-packages/botocore/client.py in _api_call(self, *args, **kwargs)
    319             # The "self" in this scope is referring to the BaseClient.
--> 320             return self._make_api_call(operation_name, kwargs)
    321

~/Desktop/pyco/test/env/lib/python3.6/site-packages/botocore/client.py in _make_api_call(self, operation_name, api_params)
    623             error_class = self.exceptions.from_code(error_code)
--> 624             raise error_class(parsed_response, operation_name)
    625         else:

ClientError: An error occurred (404) when calling the HeadObject operation: Not Found

During handling of the above exception, another exception occurred:

OSError                                   Traceback (most recent call last)
<ipython-input-29-bed9a9f3e7b2> in <module>()
----> 1 user.primary_image.save("image.jpg", File(img_temp), save=True)

~/Desktop/pyco/test/env/lib/python3.6/site-packages/django/db/models/fields/files.py in save(self, name, content, save)
     84
     85     def save(self, name, content, save=True):
---> 86         name = self.field.generate_filename(self.instance, name)
     87         self.name = self.storage.save(name, content, max_length=self.field.max_length)
     88         setattr(self.instance, self.field.name, self.name)

~/Desktop/pyco/test/env/lib/python3.6/site-packages/django/db/models/fields/files.py in generate_filename(self, instance, filename)
    300         """
    301         if callable(self.upload_to):
--> 302             filename = self.upload_to(instance, filename)
    303         else:
    304             dirname = datetime.datetime.now().strftime(self.upload_to)

~/Desktop/pyco/test/app/user/models/user.py in upload_image_to(instance, filename)
     23 def upload_image_to(instance, filename):
     24     import pdb; pdb.set_trace()
---> 25     mime_type = imghdr.what(instance.primary_image)
     26     # Normalize jpeg to jpg
     27     if mime_type == 'jpeg':

/usr/lib/python3.6/imghdr.py in what(file, h)
     17                 h = f.read(32)
     18             else:
---> 19                 location = file.tell()
     20                 h = file.read(32)
     21                 file.seek(location)

~/Desktop/pyco/test/env/lib/python3.6/site-packages/django/core/files/utils.py in <lambda>(self)
     19     readlines = property(lambda self: self.file.readlines)
     20     seek = property(lambda self: self.file.seek)
---> 21     tell = property(lambda self: self.file.tell)
     22     truncate = property(lambda self: self.file.truncate)
     23     write = property(lambda self: self.file.write)

~/Desktop/pyco/test/env/lib/python3.6/site-packages/django/db/models/fields/files.py in _get_file(self)
     41         self._require_file()
     42         if not hasattr(self, '_file') or self._file is None:
---> 43             self._file = self.storage.open(self.name, 'rb')
     44         return self._file
     45

~/Desktop/pyco/test/env/lib/python3.6/site-packages/django/core/files/storage.py in open(self, name, mode)
     31     def open(self, name, mode='rb'):
     32         """Retrieve the specified file from storage."""
---> 33         return self._open(name, mode)
     34
     35     def save(self, name, content, max_length=None):

~/Desktop/pyco/test/env/lib/python3.6/site-packages/storages/backends/s3boto3.py in _open(self, name, mode)
    411         except ClientError as err:
    412             if err.response['ResponseMetadata']['HTTPStatusCode'] == 404:
--> 413                 raise IOError('File does not exist: %s' % name)
    414             raise  # Let it bubble up if it was some other error
    415         return f

OSError: File does not exist: https:/picsum.photos/id/122/200/300