从launchd启动的Python脚本给出了ImportError：没有名为foo的模块

当python脚本ifttbot.py使用ifttbot.plist（均包含在下面）在launchd下运行时，会出现以下错误：

Traceback (most recent call last):
  File "/usr/bin/iftttbot.py", line 1, in <module>
    from selenium import webdriver
ImportError: No module named selenium

ifttbot.py

#!/opt/local/bin/python
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from time import sleep
import requests, threading,glob,sys
import bs4 as bs
from selenium.webdriver.common.action_chains import ActionChains
...
print("Invalid input, usage requires: Username Password AppletID")
...

移除#/opt/local/bin/python不能防止错误

一些终端测试表明，当使用python二进制文件的完整路径时，找不到模块，否则脚本将按预期运行：

$ which python
/opt/local/bin/python

$ /opt/local/bin/python iftttbot.py
Traceback (most recent call last):
  File "iftttbot.py", line 1, in <module>
    from selenium import webdriver
ImportError: No module named selenium

$ python iftttbot.py
Invalid input, usage requires: Username Password AppletID

$ echo $PATH
/Users/scottmeup/.local/bin:/opt/local/bin:/opt/local/sbin:/Users/scottmeup/.nvm/versions/node/v15.8.0/bin:/Users/scottmeup/opt/anaconda3/bin:/Users/scottmeup/opt/anaconda3/condabin:/Library/Frameworks/Python.framework/Versions/3.8/bin:/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

$which python
/opt/local/bin/python
$/opt/local/bin/python ifttbot.py
回溯（最近一次呼叫最后一次）：
文件“ifttbot.py”，第1行，在
从selenium导入webdriver
ImportError:没有名为selenium的模块
$python ifttbot.py
输入无效，用法要求：用户名密码AppletID
$echo$PATH
/Users/scottmeup/.local/bin:/opt/local/bin:/opt/local/sbin:/Users/scottmeup/.nvm/versions/node/v15.8.0/bin:/Users/scottmeup/opt/anaconda3/bin:/Users/scottmeup/opt/anaconda3/condabin:/Library/Frameworks/Python.framework/versions/3.8/bin:/opt/local/bin:/opt/local/local/bin:/opt/local/local/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin

Python 3.7.10

---

macOS 10.13.6

更改以下行解决了问题：

    <string>exec python /usr/bin/iftttbot.py username password AppletID</string>

exec python/usr/bin/ifttbot.py用户名密码AppletID

---

exec python3/usr/bin/ifttbot.py用户名密码AppletID

    <string>exec python /usr/bin/iftttbot.py username password AppletID</string>

    <string>exec python3 /usr/bin/iftttbot.py username password AppletID</string>