在Android上使用kivymd中的python 3.8 exchangelib时出错

Question

我使用exchangelib从python中的kivymd访问我的邮件。当我在计算机上运行我的代码时，它工作起来没有任何问题。但是，当我在Android上通过buildozer部署它并在Android上启动我的应用程序时，我看到了解析器错误。请帮帮忙，我不明白问题的来源。

11-15 13:11:05.087 21267 22545 I python  :  Traceback (most recent call last):
11-15 13:11:05.087 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/cached_property.py", line 70, in __get__
11-15 13:11:05.089 21267 22545 I python  :  KeyError: 'resolver'
11-15 13:11:05.089 21267 22545 I python  :  
11-15 13:11:05.089 21267 22545 I python  :  During handling of the above exception, another exception occurred:
11-15 13:11:05.089 21267 22545 I python  :  
11-15 13:11:05.089 21267 22545 I python  :  Traceback (most recent call last):
11-15 13:11:05.090 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/dns/resolver.py", line 743, in read_resolv_conf
11-15 13:11:05.090 21267 22545 I python  :  FileNotFoundError: [Errno 2] No such file or directory: '/etc/resolv.conf'
11-15 13:11:05.091 21267 22545 I python  :  
11-15 13:11:05.091 21267 22545 I python  :  During handling of the above exception, another exception occurred:
11-15 13:11:05.091 21267 22545 I python  :  
11-15 13:11:05.091 21267 22545 I python  :  Traceback (most recent call last):
11-15 13:11:05.092 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/app/main.py", line 155, in <module>
11-15 13:11:05.092 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/app/main.py", line 151, in main
11-15 13:11:05.093 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/kivy/app.py", line 854, in run
11-15 13:11:05.094 21267 22545 I python  :    File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
11-15 13:11:05.094 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/app/main.py", line 63, in on_start
11-15 13:11:05.095 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/app/main.py", line 108, in get_mail
11-15 13:11:05.095 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/account.py", line 116, in __init__
11-15 13:11:05.096 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 24, in discover
11-15 13:11:05.097 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 123, in discover
11-15 13:11:05.097 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 429, in _step_1
11-15 13:11:05.098 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 338, in _attempt_response
11-15 13:11:05.099 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 255, in _get_unauthenticated_response
11-15 13:11:05.099 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 379, in _is_valid_hostname
11-15 13:11:05.100 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/cached_property.py", line 74, in __get__
11-15 13:11:05.100 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/exchangelib/autodiscover/discovery.py", line 154, in resolver
11-15 13:11:05.101 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/dns/resolver.py", line 695, in __init__
11-15 13:11:05.101 21267 22545 I python  :    File "/home/andrey/PycharmProjects/stats_delay_android/.buildozer/android/platform/build-armeabi-v7a/build/python-installs/stats_delay_android/dns/resolver.py", line 746, in read_resolv_conf
11-15 13:11:05.102 21267 22545 I python  :  dns.resolver.NoResolverConfiguration: None
11-15 13:11:05.102 21267 22545 I python  : Python for android ended.

Answer 1

exchangelib需要进行DNS查找才能进行自动发现。NoResolverConfiguration是dnspython包中的一个例外，它告诉您在您的系统中找不到任何关于要联系哪些名称服务器的信息。通常，这将位于/etc/resolv.conf中，如FileNotFoundError错误所示。

我不知道Android上的DNS是如何工作的，也不知道Python如何访问Android上的DNS配置。如果您无法让dnspython获取配置，您可以在Resolver.nameservers属性中手动设置要使用的DNS服务器列表(例如[8.8.8.8])。您可以通过Autodiscovery.DNS_RESOLVER_ATTRS属性在exchangelib中进行配置：

from exchangelib.auto discover import Autodiscovery

Autodiscovery.DNS_RESOLVER_ATTRS['nameservers'] = ['8.8.8.8']