Upload a file to Dropbox

import sys
import os
import argparse

import dropbox
from dropbox.files import WriteMode
from dropbox.exceptions import ApiError

# Add OAuth2 access token here.
# You can generate one for yourself in the App Console.
# See <https://blogs.dropbox.com/developers/2014/05/generate-an-access-token-for-your-own-account/>
TOKEN = os.environ['DBTOKEN']


# Uploads contents of local_file to Dropbox
def backup(local_file, backup_path):
    with open(local_file, 'rb') as f:
        # We use WriteMode=overwrite to make sure that the settings in the file
        # are changed on upload
        try:
            dbx.files_upload(f, backup_path, mode=WriteMode('overwrite'))
        except ApiError as err:
            # This checks for the specific error where a user doesn't have
            # enough Dropbox space quota to upload this file
            if (err.error.is_path() and
                    err.error.get_path().error.is_insufficient_space()):
                sys.exit("Cannot back up; insufficient space.")
            elif err.user_message_text:
                print(err.user_message_text)
                sys.exit()
            else:
                print(err)
                sys.exit()

parser = argparse.ArgumentParser(description='Upload a file to Dropbox')
parser.add_argument('--file', '-f', help='file path')
parser.add_argument('--dbpath', '-d', help='dropbox path')

if __name__ == '__main__':
    # Create an instance of a Dropbox class, which can make requests to the API.
    dbx = dropbox.Dropbox(TOKEN)
    args = parser.parse_args()
    if not args.file:
        print("Please specify the file" +
                "Usage: uploadb.py -f file/path -d dropbox/path")
        exit(1)
    local_file = args.file
    if not args.dbpath:
        dbpath = '/' + local_file
    else:
        dbpath = args.dbpath

    # Create a backup of the current settings file
    backup(local_file, dbpath)

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