 pip install --upgrade Pillow
Collecting Pillow
  Downloading https://pypi.doubanio.com/packages/ce/ef/e793f6ffe245c960c42492d0bb50f8d14e2ba223f1922a5c3c81569cec44/Pillow-7.1.2.tar.gz (38.9MB)
    100% |████████████████████████████████| 38.9MB 10.6MB/s
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-7gVKw8/Pillow/setup.py", line 305
        yield from self.features
                 ^
    SyntaxError: invalid syntax

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-7gVKw8/Pillow/
You are using pip version 8.1.2, however version 20.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command