我已经通过pip安装了nsetools软件包：
pip install nsetools
Requirement already satisfied: nsetools in /anaconda3/lib/python3.6/site-packages (1.0.7)
Requirement already satisfied: dateutils in /anaconda3/lib/python3.6/site-packages (from nsetools) (0.6.6)
Requirement already satisfied: six in /anaconda3/lib/python3.6/site-packages (from nsetools) (1.11.0)
Requirement already satisfied: pytz in /anaconda3/lib/python3.6/site-packages (from dateutils->nsetools) (2018.4)
Requirement already satisfied: argparse in /anaconda3/lib/python3.6/site-packages (from dateutils->nsetools) (1.4.0)
Requirement already satisfied: python-dateutil in /anaconda3/lib/python3.6/site-packages (from dateutils->nsetools) (2.7.3)
当我创建一个新文件时，它将保存在以下目录中：
/users/shreygrover/Python Files
当我键入：
from nsetools import Nse
它给了我这个错误：
No module called 'nsetools'
可能是什么错误？