各位老师，新人求助，启动软件提示
Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/pythonProject/main.py", line 3, in <module>
from howtrader.trader.engine import MainEngine
File "C:\ProgramData\Anaconda3\envs\mytrader\lib\site-packages\howtrader\trader\engine.py", line 44, in <module>
from .setting import SETTINGS
File "C:\ProgramData\Anaconda3\envs\mytrader\lib\site-packages\howtrader\trader\setting.py", line 29, in <module>
"database.timezone": get_localzone().zone,
AttributeError: 'backports.zoneinfo.ZoneInfo' object has no attribute 'zone'

打不开软件了，之前还可以，重新换了个服务器就这样了

同问

请问你的python版本是？

Python 3.7.6 (default, Jan 8 2020, 19:59:22)

(tutorial-env) (base) root@zhou6288:/home/vnpy-2.1.9/examples/no_ui# python run.py
Traceback (most recent call last):
File "run.py", line 8, in <module>
from vnpy.trader.setting import SETTINGS
File "/root/tutorial-env/lib/python3.7/site-packages/vnpy/trader/setting.py", line 30, in <module>
"database.timezone": get_localzone().zone,
AttributeError: 'backports.zoneinfo.ZoneInfo' object has no attribute 'zone'

以上问题解决了，是没有启动数据库。但运行python run.py时，出现”启动CTA策略守护父进程“后一直没反应了

原来运行的是no_ui文件夹下面的run.py不行，现在运行vntrader文件夹下面的run.py,介面可以了。

zhouwencan wrote:

(tutorial-env) (base) root@zhou6288:/home/vnpy-2.1.9/examples/no_ui# python run.py
Traceback (most recent call last):
File "run.py", line 8, in <module>
from vnpy.trader.setting import SETTINGS
File "/root/tutorial-env/lib/python3.7/site-packages/vnpy/trader/setting.py", line 30, in <module>
"database.timezone": get_localzone().zone,
AttributeError: 'backports.zoneinfo.ZoneInfo' object has no attribute 'zone'

您好，请问下这个问题是怎么解决的，方便详细说下细节吗？谢谢！

搞定了.pip install tzlocal==2.1 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

把tzlocal版本降级到2.1就解决了

paul1579 wrote:

搞定了.pip install tzlocal==2.1 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

把tzlocal版本降级到2.1就解决了

感谢，用了这个办法，问题解决了