pip3安装Python3的请求，但仍然没有名为＆＃39;的模块请求＆＃39;

Question

我使用pip3 install requests为request安装Python3 这是输出：

Collecting requests
  Using cached requests-2.13.0-py2.py3-none-any.whl
Installing collected packages: requests
Successfully installed requests-2.13.0

但是当我尝试在requests中导入Python3时，错误抛出了

ImportError: No module named 'requests'

pip3 -V的输出：

pip 9.0.1 from /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages (python 3.5)  

Python3 -V的输出：Python 3.5.1