Trying to write a python script to automate uploading files to One Drive

Question

I have an App Registered with a Client id and Client Secret. If I look under API Permissions I have Sites.FilesReadWrite.All and Files.ReadWrite.All and others both delegated and application.

I've got this method to get an auth_code:

 def get_access_token(client_id, client_secret, tenant_id, scopes):
   # Create a PublicClientApplication object
    pca = msal.ConfidentialClientApplication(
        client_id=client_id,
        client_credential=client_secret,
        authority=f"https://login.microsoftonline.com/{tenant_id}"
    )
    # Acquire a token using the client credentials flow
    result = pca.acquire_token_for_client(scopes=scopes)
    # Check if the access token was successfully obtained
    if "access_token" in result:
        access_token = result["access_token"]
        return access_token
    else:
        print("Failed to acquire access token.")
        if "error" in result:
            print("Error:", result["error"])
        if "error_description" in result:
            print("Error description:", result["error_description"])
        return None

It works if I use pass in scopes = ["https://graph.microsoft.com/.default"] (but not

scopes = ["Files.ReadWrite.All"]), and returns an auth code.

I then try:

headers = {    'Authorization': 'Bearer ' + access_token }

file_path = "...my file" 
with open(file_path, 'rb') as upload:
    media_content = upload.read()

response=requests.put(GRAPH_API_ENDPOINT + f'/me/drive/items/root:/{file_name}:/content',
       headers=headers,
       data=media_content
    )
print(response.json())

It responds:

{'error': {'code': 'BadRequest', 'message': '/me request is only valid with delegated authentication flow.', ....

And if I try:

url ="https://graph.microsoft.com/v1.0/users/%s"%MY_ACCOUNT
response = requests.get(url,headers=headers)
response.json()

"""
responds 
'error': {'code': 'Request_ResourceNotFound',
  'message': "Resource '...MY Account ..' does not exist or one of its queried reference-property objects are not present.",...

"""