问我不能安装firebase-admin

EN

MacBook-Air:Firebase takeyuki$ python -m pip install --upgrade firebase-admin
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.

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Installing collected packages: futures, googleapis-common-protos, grpcio, google-api-core, uritemplate, httplib2, google-auth-httplib2, google-api-python-client, google-cloud-core, google-resumable-media, google-cloud-storage, google-cloud-firestore, msgpack, cachecontrol, firebase-admin
  Found existing installation: futures 3.0.3
Cannot uninstall 'futures'. 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.

MacBook-Air:Firebase takeyuki$ python -m pip list | grep futures
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
futures                            3.0.3