python 程序报错：

Traceback (most recent call last):
  File "common_auto_fetch_sensor.py", line 13, in <module>
    from dateutil.relativedelta import relativedelta
ModuleNotFoundError: No module named 'dateutil'

然后执行pip install也报错：

$ pip install dateutil
ERROR: Could not find a version that satisfies the requirement dateutil (from versions: none)
ERROR: No matching distribution found for dateutil

经过查资料发现这里有一个超级大的坑：
这个模块是叫python-dateutil

pip3 install python-dateutil