Cannot install certifi

[mjspeck]

Running pip install notifiers yields this error:

Collecting notifiers
  Using cached https://files.pythonhosted.org/packages/ed/c2/106e11d562d818a8ea0d31b6bbe260726f54f755edd34b4486ea26836402/notifiers-1.0.3-py3-none-any.whl
Requirement already satisfied: click==7.0 in /Users/matthewspeck/anaconda3/lib/python3.6/site-packages (from notifiers) (7.0)
Requirement already satisfied: jsonschema==2.6.0 in /Users/matthewspeck/anaconda3/lib/python3.6/site-packages (from notifiers) (2.6.0)
Requirement already satisfied: idna==2.7 in /Users/matthewspeck/anaconda3/lib/python3.6/site-packages (from notifiers) (2.7)
Collecting rfc3987==1.3.8 (from notifiers)
  Using cached https://files.pythonhosted.org/packages/65/d4/f7407c3d15d5ac779c3dd34fbbc6ea2090f77bd7dd12f207ccf881551208/rfc3987-1.3.8-py2.py3-none-any.whl
Collecting certifi==2018.4.16 (from notifiers)
  Using cached https://files.pythonhosted.org/packages/7c/e6/92ad559b7192d846975fc916b65f667c7b8c3a32bea7372340bfe9a15fa5/certifi-2018.4.16-py2.py3-none-any.whl
Requirement already satisfied: chardet==3.0.4 in /Users/matthewspeck/anaconda3/lib/python3.6/site-packages (from notifiers) (3.0.4)
Requirement already satisfied: urllib3==1.23 in /Users/matthewspeck/anaconda3/lib/python3.6/site-packages (from notifiers) (1.23)
Collecting requests==2.20.1 (from notifiers)
  Using cached https://files.pythonhosted.org/packages/ff/17/5cbb026005115301a8fb2f9b0e3e8d32313142fe8b617070e7baad20554f/requests-2.20.1-py2.py3-none-any.whl
Installing collected packages: rfc3987, certifi, requests, notifiers
  Found existing installation: certifi 2018.11.29
Cannot uninstall 'certifi'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

This is with Python 3.6.8 from Anaconda.

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[mjspeck]

Seems like the stop gap is to run this: pip install notifiers --ignore-installed.