如何使用 PyDrive 替换/更新 Google Drive 上的文件？答案

【问题标题】：How to replace/update a file on Google Drive with PyDrive?如何使用 PyDrive 替换/更新 Google Drive 上的文件？
【发布时间】：2019-05-10 17:32:16
【问题描述】：

我的应用程序需要每天上传一些文件，更新那些已经存在的文件。

我知道如果我传递现有文件的 ID，它们将被更新，但我想知道是否有更聪明的解决方案。

def upload_file(path, folder, filename, drive):

    if not os.path.exists(path):
        print('Arquivo não encontrado: {}'.format(filename))
        return

   

    id_folder_destiny = get_id_from_gdrive(folder)
    file_metadata = {'title': filename, 
        'parents': [{'kind': 'drive#fileLink',
        'id': id_folder_destiny}]}
    file = drive.CreateFile(file_metadata)
       
    file.SetContentFile(path)
    file.Upload()

上面的代码没有“搜索现有 ID”。

【问题讨论】：

标签： python python-3.x google-api google-drive-api pydrive

【解决方案1】：

我发现更新 Google 驱动器文件的最佳解决方案是上传带有drive.CreateFile 函数中所述 ID 的文件，就像你说的那样。这是我下载然后覆盖特定文件的代码。

def upload_file_to_drive(file_id, local_path):
    """Overwrites the existing Google drive file."""
    update_file = drive.CreateFile({'id': file_id})
    update_file.SetContentFile(local_path)
    update_file.Upload()

def download_drive_file(file_id, save_path):
    """Downloads an existing Google drive file."""
    download_file = drive.CreateFile({'id': file_id})
    download_file.GetContentFile(save_path)

与 OOP 类一起使用：

from pydrive.auth import GoogleAuth
from pydrive.drive import GoogleDrive

def get_google_drive_auth(self):
    """Initilaizes the Google drive 'drive' object. """
    gauth = GoogleAuth()

    # Try to load saved client credentials
    gauth.LoadCredentialsFile("path/to/your/credentials/file")

    if gauth.credentials is None:
        # Authenticate if they're not there
        gauth.GetFlow()
        gauth.flow.params.update({'access_type': 'offline'})
        gauth.flow.params.update({'approval_prompt': 'force'})
        gauth.LocalWebserverAuth()

    elif gauth.access_token_expired:
        # Refresh them if expired
        gauth.Refresh()
    else:
        # Initialize the saved creds
        gauth.Authorize()

    # Save the current credentials to a file
    gauth.SaveCredentialsFile("path/to/your/credentials/file")  

    self.drive = GoogleDrive(gauth)
    
def upload_file_to_drive(self, file_id, local_path):
    """Overwrites the existing Google drive file."""
    update_file = self.drive.CreateFile({'id': file_id})
    update_file.SetContentFile(local_path)
    update_file.Upload()
    
def download_drive_file(self,file_id, save_path):
    """Downloads an existing Google drive file."""
    download_file = self.drive.CreateFile({'id': file_id})
    download_file.GetContentFile(save_path)  # Save Drive file as a local file

【讨论】：