tomcat用户或任何使用python2或python3的用户都找不到boto3模块，而在从根目录运行python2或3的情况下可以很好地工作。

-bash-4.2$ python
Python 2.7.5 (default, Nov 16 2020, 22:23:17)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import boto3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named boto3
>>>
-bash-4.2$ whoami
tomcat

根用户工作

[root@server-name]# python
Python 2.7.5 (default, Nov 16 2020, 22:23:17)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import boto3
>>>