我正在嘗試將文件上傳到存儲(chǔ)桶，解析為 json 并將其插入到 bigquery 中的表中。我收到這個(gè)錯(cuò)誤AttributeError: 'str' object has no attribute 'blob'我認(rèn)為這是一個(gè)依賴(lài)問(wèn)題，但我不知道如何解決。我直接在云函數(shù) GUI 中編碼。def create_gcs(event, context):    """Triggered by a change to a Cloud Storage bucket.    Args:         event (dict): Event payload.         context (google.cloud.functions.Context): Metadata for the event.    """    file = event    print(f"********The file {file['name']} was created in {file['bucket']} at {event['timeCreated']}")            bucket = file['bucket']    blob = bucket.get_blob(file['name'])    data = blob.download_as_string()    table_id="tableid"    client=bigquery.Client()    client.insert_rows_json(table_id,[data])    print(blob)