linux - crontab执行python脚本无效，crontab有执行日志

Question

我的crontab脚本是这样的，每分钟进入/home/ubuntu/python/env虚拟环境执行一次/home/ubuntu/python/Test/run.py

# Begin Plan generated jobs for: main
* * * * * cd /home/ubuntu/python && source env/bin/activate && python Test/run.py
# End Plan generated jobs for: main

在/var/log/cron.log查看到的日志如下

Oct  6 04:09:01 ip-172-31-43-145 CRON[2855]: (ubuntu) CMD (cd /home/ubuntu/python && source env/bin/activate && python Test/run.py)
Oct  6 04:09:01 ip-172-31-43-145 CRON[2854]: (CRON) info (No MTA installed, discarding output)
Oct  6 04:10:01 ip-172-31-43-145 CRON[2857]: (ubuntu) CMD (cd /home/ubuntu/python && source env/bin/activate && python Test/run.py)
Oct  6 04:10:01 ip-172-31-43-145 CRON[2856]: (CRON) info (No MTA installed, discarding output)

但是run.py并没有执行，如果单独执行下面语句，则可以执行成功

$ cd /home/ubuntu/python && source env/bin/activate && python Test/run.py

why, any body help me?

Answer 1

还是让crontab执行shell，然后在shell脚本中执行python，可行：http://blog.bomobox.org/2016-10-06/crontab-python/

Answer 2

试试这个呢:

cd /home/ubuntu/python && /home/ubuntu/python/env/bin/python Test/run.py

Answer 3

YOU CAN TRY

* * * * * cd /home/ubuntu/python && source env/bin/activate && python Test/run.py >> /home/ubuntu/python/crond.log