Question

我一直得到：AttributeError：＆＃39; NoneType＆＃39;对象没有属性＆＃39; is_downloaded＆＃39;。我正在尝试将pyupdater与可执行文件集成。我的amazon文件夹包含：pyu_test-win-1.0.zip和我上传的versions.gz。

Error:
{}
{}
nothing new
Traceback (most recent call last):
  File "C:/Users/D1/Desktop/31/pyu_test.py", line 25, in <module>
    if app_update.is_downloaded():
AttributeError: 'NoneType' object has no attribute 'is_downloaded'

Process finished with exit code 1

I'm getting also unresolved reference client_config as well as ClientConfig is underlined when I hover.

这是为了： pyu_test.py

from pyupdater.client import Client
from client_config import ClientConfig

APP_NAME = 'pyu_test'
APP_VERSION = '1.0'

def print_status_info(info):
    total = info.get(u'total')
    downloaded = info.get(u'downloaded')
    status = info.get(u'status')
    print (downloaded, total, status)


client = Client(ClientConfig(), refresh=True,
                        progress_hooks=[print_status_info])


app_update = client.update_check(APP_NAME, APP_VERSION)

if app_update is not None:
    app_update.download()
else:
    print("nothing new")

if app_update.is_downloaded():
    app_update.extract_overwrite()

client_config

class ClientConfig(object):
    PUBLIC_KEY = '+WDWADADAWDADDWDW'
    APP_NAME = 'pyu_test'
    COMPANY_NAME = 'pyu_test'
    UPDATE_URLS = ['https://console.aws.amazon.com/s3/buckets/xWAXWED/?region=us-east-2&tab=overview']
    MAX_DOWNLOAD_RETRIES = 3

我有什么想法可以解决这个问题。欢呼声。

Answer 1

具体取决于.download()的确切含义，以下内容可能有效：

app_update = client.update_check(APP_NAME, APP_VERSION)

if app_update is not None:
    app_update.download()
    app_update.extract_overwrite()
else:
    print("App Update not downloaded")

无论它做什么，以下是代码的“安全”版本，不再具有特定类型错误。

app_update = client.update_check(APP_NAME, APP_VERSION)

if app_update is not None:
    app_update.download()
else:
    print("nothing new")

if app_update is not None and app_update.is_downloaded():
    app_update.extract_overwrite()

请注意，第二个if语句必须按此顺序编写，并且：

if app_update.is_downloaded() and app_update is not None:

由于Python如何评估这些表达式，

将导致潜在的错误。

在不了解您的代码正在做什么的更多内容的情况下，我无法进一步详细了解最佳实践的变化。

AttributeError：＆＃39; NoneType＆＃39;对象没有属性＆＃39; is_downloaded＆＃39;

1 个答案: