Upload a list of files to Google Drive

uploadfiles.py

import os
import sys
import pickle
from googleapiclient.discovery import build
from googleapiclient.http import MediaFileUpload
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

directoryIndexMap = {}

def log(msg):
    logging.debug(msg)

def uploadFiles(destPath, files):
    # If modifying these scopes, delete the file token.pickle.
    SCOPES = ['https://www.googleapis.com/auth/drive']
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first time.
    if os.path.exists(abs_path('token.pickle')):
        with open(abs_path('token.pickle'), 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(abs_path('credentials.json'), SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open(abs_path('token.pickle'), 'wb') as token:
            pickle.dump(creds, token)

    service = build('drive', 'v3', credentials=creds, cache_discovery=False)

    for fileFullPath in files:
        log('uploading: ' + fileFullPath)
        fileName = fileFullPath.split("/")[-1]
        folderName = destPath

        folderId = ''
        if folderName in directoryIndexMap:
            folderId = directoryIndexMap[folderName]
        else:
            folderSegments = folderName.split("/")
            parentId = 'root'

            for segment in folderSegments:
                log("Checking path segment: " + segment)
                response = service.files().list(q="mimeType='application/vnd.google-apps.folder' and trashed=false and '" + parentId + "' in parents and name='" + segment + "'", spaces='drive', fields='files(id, name)').execute()
                folderId = ''
                for file in response.get('files', []):
                    folderId = file.get('id')
                    log('Found folder: %s (%s)' % (file.get('name'), folderId))
                if folderId == '':
                    log("Folder doesn't exist, so creating with parent id " + parentId)
                    file = service.files().create(body={'name': segment, 'mimeType': 'application/vnd.google-apps.folder', 'parents': [parentId]}, fields='id').execute()
                    folderId = file.get('id')
                if folderId == '':
                    log("Failed to create folder, so aborting...")
                    return
                parentId = folderId
            directoryIndexMap[folderName] = folderId

        log('Folder ID: %s' % folderId)

        file_metadata = {'name': fileName, 'parents': [folderId]}
        media = MediaFileUpload(fileFullPath, mimetype='application/octet-stream')
        file = service.files().create(body=file_metadata, media_body=media, fields='id').execute()
        log('File ID: %s' % file.get('id'))