類型錯誤：initial_value必須STR或無，而不是字節（大量查詢）

Question

我使用python3.5和我使用python創建經由大量查詢bigquery client（https://github.com/tylertreat/BigQuery-Python）

下面是代碼：

from bigquery import get_client 

PROJECT_ID = 'api-project-xxxxxx' 
SERVICE_ACCOUNT = 'xxxx@api-project-xxxx.iam.gserviceaccount.com' 
PRIVATE_KEY_PATH = 'xxxx.p12' 

with open(PRIVATE_KEY_PATH, 'rb') as f: 
    private_key = f.read() 

client = get_client(PROJECT_ID,private_key=private_key,service_account=SERVICE_ACCOUNT,readonly=True) 

我有以下錯誤：

--------------------------------------------------------------------------- 
TypeError         Traceback (most recent call last) 
<ipython-input-181-858afcfa416a> in <module>() 
----> 1 client = get_client(PROJECT_ID,private_key=private_key,service_account=SERVICE_ACCOUNT,readonly=True) 
/Users/XXXXXX/.pyenv/versions/anaconda3-2.4.0/lib/python3.5/site-packages/bigquery/client.py in get_client(project_id, credentials, service_url, service_account, private_key, private_key_file, json_key, json_key_file, readonly, swallow_results) 
    131   credentials = _credentials().from_p12_keyfile_buffer(
    132    service_account, 
--> 133    StringIO(private_key), 
    134    scopes=scope) 
    135 
TypeError: initial_value must be str or None, not bytes 

Answer 1

StringIO一個str對象轉換成流。您需要通過str，但private_key是一個字節對象，因爲您正在以二進制模式讀取文件。試試這個：

with open(PRIVATE_KEY_PATH, 'r') as f: 
    private_key = f.read() 

其餘的代碼保持不變。