root cause of: sequence item 0: expected str instance, NoneType found ?

[gordianbahri]

I'm trying to integrate boto3 according to this blogpost https://www.codingforentrepreneurs.com/blog/django-static-files-digitalocean-spaces/ .

When running python manage.py collectstatic I recive the following error:

Traceback (most recent call last):
  File "C:\...\...\manage.py", line 22, in <module>
    main()
  File "C:\...\...\manage.py", line 18, in main    
    execute_from_command_line(sys.argv)
  File "C:\...\lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "C:\...\lib\site-packages\django\core\management\__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\...\lib\site-packages\django\core\management\base.py", line 414, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\...\lib\site-packages\django\core\management\base.py", line 460, in execute
    output = self.handle(*args, **options)
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 209, in handle
    collected = self.collect()
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 135, in collect
    handler(path, prefixed_path, storage)
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 368, in copy_file
    if not self.delete_file(path, prefixed_path, source_storage):
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 278, in delete_file
    if self.storage.exists(prefixed_path):
  File "C:\...\lib\site-packages\storages\backends\s3boto3.py", line 467, in exists
    self.connection.meta.client.head_object(Bucket=self.bucket_name, Key=name)
  File "C:\...\lib\site-packages\botocore\client.py", line 508, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "C:\...\lib\site-packages\botocore\client.py", line 898, in _make_api_call
    http, parsed_response = self._make_request(
  File "C:\...\lib\site-packages\botocore\client.py", line 921, in _make_request
    return self._endpoint.make_request(operation_model, request_dict)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 119, in make_request
    return self._send_request(request_dict, operation_model)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 198, in _send_request
    request = self.create_request(request_dict, operation_model)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 134, in create_request
    self._event_emitter.emit(
  File "C:\...\lib\site-packages\botocore\hooks.py", line 412, in emit
    return self._emitter.emit(aliased_event_name, **kwargs)
  File "C:\...\lib\site-packages\botocore\hooks.py", line 256, in emit
    return self._emit(event_name, kwargs)
  File "C:\...\lib\site-packages\botocore\hooks.py", line 239, in _emit
    response = handler(**kwargs)
  File "C:\...\lib\site-packages\botocore\signers.py", line 103, in handler
    return self.sign(operation_name, request)
  File "C:\...\lib\site-packages\botocore\signers.py", line 187, in sign
    auth.add_auth(request)
  File "C:\...\lib\site-packages\botocore\auth.py", line 421, in add_auth
    self._inject_signature_to_request(request, signature)
  File "C:\...\lib\site-packages\botocore\auth.py", line 424, in _inject_signature_to_request
    auth_str = ['AWS4-HMAC-SHA256 Credential=%s' % self.scope(request)]
  File "C:\...\lib\site-packages\botocore\auth.py", line 373, in scope
    return '/'.join(scope)
TypeError: sequence item 0: expected str instance, NoneType found

What is the problem in this case? I've searched a lot but couldn't manage to find anything...

[aBurmeseDev]

Hi @Dotolox, thanks for reaching out.

I found a couple similar issues on stackOverflow listed below and the possible cause mentioned in those posts is because of the lack of return from a function or join method which simply returns None.

• Registration - sequence item 0: expected str instance, NoneType found
• Python TypeError: sequence item 0: expected str instance, NoneType found

Let me know if any of this helps. If you're still having issue, please share your code snippet with any sensitive information redacted.

[lanjiao-yai-yai]

having the same issue from botocore. seem like a problem with botocore.

currently using latest version of django-storages and boto related packages. using digitalocean spaces as storage. previous server works, once change to new server (ubuntu 22, same code base, nothing change), this issue happened.

[lanjiao-yai-yai]

I'm trying to integrate boto3 according to this blogpost https://www.codingforentrepreneurs.com/blog/django-static-files-digitalocean-spaces/ .

When running python manage.py collectstatic I recive the following error:

Traceback (most recent call last):
  File "C:\...\...\manage.py", line 22, in <module>
    main()
  File "C:\...\...\manage.py", line 18, in main    
    execute_from_command_line(sys.argv)
  File "C:\...\lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "C:\...\lib\site-packages\django\core\management\__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\...\lib\site-packages\django\core\management\base.py", line 414, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\...\lib\site-packages\django\core\management\base.py", line 460, in execute
    output = self.handle(*args, **options)
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 209, in handle
    collected = self.collect()
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 135, in collect
    handler(path, prefixed_path, storage)
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 368, in copy_file
    if not self.delete_file(path, prefixed_path, source_storage):
  File "C:\...\lib\site-packages\django\contrib\staticfiles\management\commands\collectstatic.py", line 278, in delete_file
    if self.storage.exists(prefixed_path):
  File "C:\...\lib\site-packages\storages\backends\s3boto3.py", line 467, in exists
    self.connection.meta.client.head_object(Bucket=self.bucket_name, Key=name)
  File "C:\...\lib\site-packages\botocore\client.py", line 508, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "C:\...\lib\site-packages\botocore\client.py", line 898, in _make_api_call
    http, parsed_response = self._make_request(
  File "C:\...\lib\site-packages\botocore\client.py", line 921, in _make_request
    return self._endpoint.make_request(operation_model, request_dict)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 119, in make_request
    return self._send_request(request_dict, operation_model)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 198, in _send_request
    request = self.create_request(request_dict, operation_model)
  File "C:\...\lib\site-packages\botocore\endpoint.py", line 134, in create_request
    self._event_emitter.emit(
  File "C:\...\lib\site-packages\botocore\hooks.py", line 412, in emit
    return self._emitter.emit(aliased_event_name, **kwargs)
  File "C:\...\lib\site-packages\botocore\hooks.py", line 256, in emit
    return self._emit(event_name, kwargs)
  File "C:\...\lib\site-packages\botocore\hooks.py", line 239, in _emit
    response = handler(**kwargs)
  File "C:\...\lib\site-packages\botocore\signers.py", line 103, in handler
    return self.sign(operation_name, request)
  File "C:\...\lib\site-packages\botocore\signers.py", line 187, in sign
    auth.add_auth(request)
  File "C:\...\lib\site-packages\botocore\auth.py", line 421, in add_auth
    self._inject_signature_to_request(request, signature)
  File "C:\...\lib\site-packages\botocore\auth.py", line 424, in _inject_signature_to_request
    auth_str = ['AWS4-HMAC-SHA256 Credential=%s' % self.scope(request)]
  File "C:\...\lib\site-packages\botocore\auth.py", line 373, in scope
    return '/'.join(scope)
TypeError: sequence item 0: expected str instance, NoneType found

What is the problem in this case? I've searched a lot but couldn't manage to find anything...

have you found the underlying problem? thanks in advance