Cannot get Google Drive API v3 to return nextPageToken,incompleteSearch,files

MAJOR EDIT
This entire post is the result of a pilot error. There was a python function within another function that was extracting only the files key from the returned response. This was completely missed. The program works fine. The answer below is correct.

I know that as of v3,

GET https://www.googleapis.com/drive/v3/files

returns only an array of much smaller docs with name, id, etc. If I change this to:

GET https://www.googleapis.com/drive/v3/files?fields=files
or
GET https://www.googleapis.com/drive/v3/files?fields=files(id,name,createdTime,size)

it works; I get back loads of detailed information. But I cannot seem to find the right incantation to get it to emit a single doc that includes nextPageToken and incompleteSearch along with the array of files. I was hoping

GET https://www.googleapis.com/drive/v3/files?fields=nextPageToken,files(id,name,createdTime,size)

would work but it does not. In fact,

GET https://www.googleapis.com/drive/v3/files?fields=nextPageToken

yields an empty array (but return code 200). I'd really like to get:

{
   nextPageToken: ...
   incompleteSearch: ...
   files: [
      {id,name,createdTime,size},
      {id,name,createdTime,size}
   ]
}

This is all going through requests and the OAuth2 bearer token setup is fine.

EDIT
The solution below works as described when called directly on the command line from curl. But from a python program using requests, it does not.
More to come on this….

In your situation, how about the following field value?

incompleteSearch,nextPageToken,files(id,name,createdTime,size)

When this is reflected in the endpoint of "Method: files.list", it becomes as follows. In this case, the query parameter is used with the URL encoding. Please be careful about this.

https://www.googleapis.com/drive/v3/files?fields=incompleteSearch%2CnextPageToken%2Cfiles(id%2Cname%2CcreatedTime%2Csize)

• By this endpoint, the following result is returned.

  {
    "nextPageToken": "###",
    "incompleteSearch": ###,
    "files": [
      {
        "size": "12345",
        "id": "###",
        "name": "###",
        "createdTime": "2023-01-01T00:00:00.000Z"
      },
      ,
      ,
      ,
    ]
  }
  

References:

• REST Resource: files
• Method: files.list