Yeah so this might be a little late but I fixed my problem like this:

• Go to Settings/Preferences
• Select Project Interpreter
• And press the + button on the left side

That + sign

• Search for requests
• And press Install Package

I am running: Windows 10 Python 3.7.1

Says requirement already satisfied

you can use this :

just go to file > sitting > project : name > project interpreter > add > search and install

Note these lines in your traceback:

File "C:\Users\moter\AppData\Local\Programs\Python\Python37\lib\email\_parseaddr.py", line 16, in <module>
import time, calendar
File "C:\Users\moter\PycharmProjects\compsci\alarm_project\calendar.py", line 1, in <module>
from O365 import Account

You have a file named calendar.py which conflicts with something that the email module is trying to import. Your file calendar.py does then go on to import something from O365 which ends up trying to import Session from requests:

  from O365 import Account
File "C:\Users\moter\AppData\Local\Programs\Python\Python37\lib\site-packages\O365\__init__.py", line 8, in <module>
  from .account import Account
File "C:\Users\moter\AppData\Local\Programs\Python\Python37\lib\site-packages\O365\account.py", line 1, in <module>
  from .connection import Connection, Protocol, MSGraphProtocol
File "C:\Users\moter\AppData\Local\Programs\Python\Python37\lib\site-packages\O365\connection.py", line 9, in <module>
  from requests import Session

Which ends up being a circular import, caused by the conflicting filename. So simply rename your calendar.py, e.g. to mycalendar.py and your issue should be solved

You installed requests into a different Python installation. The /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages is the site-packages directory for the Mac OS X /usr/bin/python installation.

PyCharm is not currently configured to use that Python installation; check what Python is being used either by looking at your PyCharm settings, or by asking Python directly with:

import sys
print(sys.executable)

Note that PyCharm can handle package installations for you as well; rather than use the command line pip consider using PyCharm, as it'll use the currently configured Python installation in that case.