上载大文件不起作用-Google Drive Python API

此脚本适用于小文件，但是当我尝试上传大文件(250MB)时不起作用.当我手动将相同的大文件上传到GD时，它花费的时间不到10秒，因此我认为我的连接不是问题.

This script works for small files, but not when I try to upload a large file (250MB). When I manually upload the same large file to GD it takes less than 10 seconds, so I assume my connection is not the problem.

upload.py

from __future__ import print_function
import os
import sys

from apiclient.http import MediaFileUpload
from apiclient.discovery import build
from httplib2 import Http
from oauth2client import file, client, tools

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

SCOPES = 'https://www.googleapis.com/auth/drive.file'
store = file.Storage(r'C:\Users\lucas.rezende\.credentials\storage.json')
creds = store.get()

if not creds or creds.invalid:
    flow = client.flow_from_clientsecrets(r'C:\Users\lucas.rezende\.credentials\client_secret.json', scope=SCOPES)
    creds = tools.run_flow(flow, store, flags) if flags else tools.run(flow, store)
DRIVE = build('drive', 'v3', http=creds.authorize(Http()))

FILES = (
    ('OfertasMensais_20170418_n.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'),
)

for filename, mimeType in FILES:

    media_body = MediaFileUpload(filename, chunksize=1024*256, resumable = True)

    folder_id = '0000'
    metadata = {'name': filename, 'parents': [folder_id]}

    if mimeType:
        metadata['mimeType'] = mimeType
    res = DRIVE.files().create(body=metadata, media_body=filename).execute()

    if res:
        print('Uploaded "%s" (%s)' % (filename, res['mimeType']))

当我运行python uploadfile.py时，cmd屏幕将一直保持不变:

When I run python uploadfile.py cmd screen stays like that eternally:

有人可以帮忙发现如何进行这项工作吗?我不是一个专业的程序员，并且我花了将近两个小时的时间来尝试完成这项工作.

Can someone help to discover how to make this work? I am not a professional programmer and I am stuck into this for almost two hours trying to make this work.