Cron不会导入pandas模块来执行python脚本。 ```ImportError：没有名为pandas```的模块

Question

我正在使用xubuntu 18.01

我有一个python程序，它刮擦天气数据并将文件保存为csv。在我使用weatherdata授权后，它在终端中完美地运行命令chmod +x weatherdata。

我希望这可以使用cron每两周运行一次。但是在我设置之后没有任何反应。

我正在使用NANO cron编辑器

我已经设置了cronjob尝试PATH变量，SHELL = / bin / bash /。 P把/ bin / bash放在命令前......都无济于事....

# crontab -e
SHELL=/bin/bash
MAILTO= [email protected] (removed my actual email for privacy)
PATH=/home/luke/bin/
# Edit this file to introduce tasks to be run by cron.
# 
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
# 
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').# 
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
# 
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
# 
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
# 
# For more information see the manual pages of crontab(5) and cron(8)
# 
# m h  dom mon dow   command


34 * * * * /bin/bash /home/luke/bin/weatherdata

我希望weatherdata python文件每小时在34分钟执行一次。

什么都没发生，我没有收到电子邮件或任何东西。

---

编辑：

我改为顶部

SHELL=/bin/bash
#[email protected] (commented it out)
PATH=/home/luke/bin/:/usr/sbin:/usr/bin:/sbin:/bin

运行后我得到的：15 * * * * /bin/bash /home/luke/bin/weatherdata > /tmp/weatherlog 2>&1，如评论中所建议的那样。

Traceback (most recent call last):
  File "/home/luke/Documents/Duka/Master_River_Levels_LOOP.py", line 9, in <module>
    import pandas as pd
ImportError: No module named pandas
Traceback (most recent call last):
  File "/home/luke/Documents/Duka/Temp_Mean_Weather_loop.py", line 9, in <module>
    import pandas as pd
ImportError: No module named pandas

我需要导入一些模块来运行python脚本，第一个是panadas。

Answer 1

crontab -e工作看起来很好。

为什么不使用：

34 * * * * /home/luke/bin/weatherdata

或者设置一个sh文件......例如。 myfile.sh

#!/usr/local/env bash
/home/luke/bin/weatherdata

然后crontab -e读取

34 * * * * /home/luke/myfile.sh

除非你的系统管理员阻止它，否则Cron会做梦。

Answer 2

正如@thatotherguy所说，这是我的道路问题。

1）我在终端跑了echo $PATH然后回来了：

/home/luke/anaconda3/bin:/home/luke/anaconda3/condabin:/home/luke/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

2）我复制并粘贴上面的路径来替换：PATH=/home/luke/bin/:/usr/sbin:/usr/bin:/sbin:/bin with

PATH=/home/luke/anaconda3/bin:/home/luke/anaconda3/condabin:/home/luke/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin 

3）我将PATH=/改为PATH=$PATH:/

现在cronjob完美地执行了。