requests.__file__
'/Library/Python/2.7/site-packages/requests/__init__.pyc'
>>> import request
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'request'
>>> os.__file__
'/usr/local/Cellar/python3/3.6.2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/os.py'
使用pip安装一个python3第三方库:sduo python3 -m pip install requests
Successfully installed requests-2.18.4 urllib3-1.22
完美解决问题