次のいずれかを試してもエラーが出ます。

```

    pip install mplfinance
    
```

```

    pip3 install mplfainace
    
```

すごい長いのですが、エラーは下の通りとなります。どのように対処すべきか、ご教示いただけると幸いです。  
よろしくお願いいたします。

```

    C:\Users\masanori\Downloads>pip3 install mplfinance
    Collecting mplfinance
      Using cached mplfinance-0.12.7a0-py3-none-any.whl (55 kB)
    Requirement already satisfied: pandas in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from mplfinance) (1.1.3)
    Processing c:\users\masanori\appdata\local\pip\cache\wheels\a6\65\5d\e2634e905fc0a7d4486dfc5acd9e68b48aae52634d82c5ed69\matplotlib-3.3.2-cp39-cp39-win_amd64.whl
    Requirement already satisfied: numpy>=1.15.4 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from pandas->mplfinance) (1.19.2)
    Requirement already satisfied: python-dateutil>=2.7.3 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from pandas->mplfinance) (2.8.1)
    Requirement already satisfied: pytz>=2017.2 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from pandas->mplfinance) (2020.1)
    Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from matplotlib->mplfinance) (2.4.7)
    Requirement already satisfied: cycler>=0.10 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from matplotlib->mplfinance) (0.10.0)
    Requirement already satisfied: certifi>=2020.06.20 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from matplotlib->mplfinance) (2020.6.20)
    Collecting pillow>=6.2.0
      Using cached Pillow-7.2.0.tar.gz (39.1 MB)
    Requirement already satisfied: kiwisolver>=1.0.1 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from matplotlib->mplfinance) (1.2.0)
    Requirement already satisfied: six>=1.5 in c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages (from python-dateutil>=2.7.3->pandas->mplfinance) (1.15.0)
    Building wheels for collected packages: pillow
      Building wheel for pillow (setup.py) ... error
      ERROR: Command errored out with exit status 1:
       command: 'c:\users\masanori\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"'; __file__='"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\masanori\AppData\Local\Temp\pip-wheel-7d06m439'
           cwd: C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\
      Complete output (172 lines):
      C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py:42: RuntimeWarning: Pillow 7.2.0 does not support Python 3.9 and does not provide prebuilt Windows binaries. We do not recommend building from source on Windows.
        warnings.warn(
      running bdist_wheel
      running build
      running build_py
      creating build
      creating build\lib.win-amd64-3.9
      creating build\lib.win-amd64-3.9\PIL
      copying src\PIL\BdfFontFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\BlpImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\BmpImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\BufrStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ContainerIO.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\CurImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\DcxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\DdsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\EpsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ExifTags.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\features.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\FitsStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\FliImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\FontFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\FpxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\FtexImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GbrImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GdImageFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GifImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GimpGradientFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GimpPaletteFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\GribStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\Hdf5StubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\IcnsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\IcoImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\Image.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageChops.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageCms.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageColor.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageDraw.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageDraw2.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageEnhance.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageFilter.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageFont.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageGrab.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageMath.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageMode.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageMorph.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageOps.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImagePalette.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImagePath.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageQt.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageSequence.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageShow.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageStat.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageTk.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageTransform.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImageWin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\ImtImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\IptcImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\Jpeg2KImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\JpegImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\JpegPresets.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\McIdasImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\MicImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\MpegImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\MpoImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\MspImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PaletteFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PalmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PcdImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PcfFontFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PcxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PdfImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PdfParser.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PixarImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PngImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PpmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PsdImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PSDraw.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\PyAccess.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\SgiImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\SpiderImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\SunImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\TarIO.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\TgaImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\TiffImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\TiffTags.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\WalImageFile.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\WebPImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\WmfImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\XbmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\XpmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\XVThumbImagePlugin.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\_binary.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\_tkinter_finder.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\_util.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\_version.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\__init__.py -> build\lib.win-amd64-3.9\PIL
      copying src\PIL\__main__.py -> build\lib.win-amd64-3.9\PIL
      running egg_info
      writing src\Pillow.egg-info\PKG-INFO
      writing dependency_links to src\Pillow.egg-info\dependency_links.txt
      writing top-level names to src\Pillow.egg-info\top_level.txt
      reading manifest file 'src\Pillow.egg-info\SOURCES.txt'
      reading manifest template 'MANIFEST.in'
      warning: no files found matching '*.c'
      warning: no files found matching '*.h'
      warning: no files found matching '*.sh'
      warning: no previously-included files found matching '.appveyor.yml'
      warning: no previously-included files found matching '.coveragerc'
      warning: no previously-included files found matching '.editorconfig'
      warning: no previously-included files found matching '.readthedocs.yml'
      warning: no previously-included files found matching 'codecov.yml'
      warning: no previously-included files matching '.git*' found anywhere in distribution
      warning: no previously-included files matching '*.pyc' found anywhere in distribution
      warning: no previously-included files matching '*.so' found anywhere in distribution
      no previously-included directories found matching '.ci'
      writing manifest file 'src\Pillow.egg-info\SOURCES.txt'
      running build_ext
    
    
      The headers or library files could not be found for zlib,
      a required dependency when compiling Pillow from source.
    
      Please see the install instructions at:
         https://pillow.readthedocs.io/en/latest/installation.html
    
      Traceback (most recent call last):
        File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 864, in <module>
          setup(
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages\setuptools\__init__.py", line 165, in setup
          return distutils.core.setup(**attrs)
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\core.py", line 148, in setup
          dist.run_commands()
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 966, in run_commands
          self.run_command(cmd)
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
          cmd_obj.run()
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages\wheel\bdist_wheel.py", line 290, in run
          self.run_command('build')
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\cmd.py", line 313, in run_command
          self.distribution.run_command(command)
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
          cmd_obj.run()
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\command\build.py", line 135, in run
          self.run_command(cmd_name)
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\cmd.py", line 313, in run_command
          self.distribution.run_command(command)
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
          cmd_obj.run()
        File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\command\build_ext.py", line 340, in run
          self.build_extensions()
        File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 694, in build_extensions
          raise RequiredDependencyException(f)
      __main__.RequiredDependencyException: zlib
    
      During handling of the above exception, another exception occurred:
    
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 918, in <module>
          raise RequiredDependencyException(msg)
      __main__.RequiredDependencyException:
    
      The headers or library files could not be found for zlib,
      a required dependency when compiling Pillow from source.
    
      Please see the install instructions at:
         https://pillow.readthedocs.io/en/latest/installation.html
    
    
      ----------------------------------------
      ERROR: Failed building wheel for pillow
      Running setup.py clean for pillow
    Failed to build pillow
    Installing collected packages: pillow, matplotlib, mplfinance
        Running setup.py install for pillow ... error
        ERROR: Command errored out with exit status 1:
         command: 'c:\users\masanori\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"'; __file__='"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\masanori\AppData\Local\Temp\pip-record-f114gzuk\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\masanori\appdata\local\programs\python\python39\Include\pillow'
             cwd: C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\
        Complete output (174 lines):
        C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py:42: RuntimeWarning: Pillow 7.2.0 does not support Python 3.9 and does not provide prebuilt Windows binaries. We do not recommend building from source on Windows.
          warnings.warn(
        running install
        running build
        running build_py
        creating build
        creating build\lib.win-amd64-3.9
        creating build\lib.win-amd64-3.9\PIL
        copying src\PIL\BdfFontFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\BlpImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\BmpImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\BufrStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ContainerIO.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\CurImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\DcxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\DdsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\EpsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ExifTags.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\features.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\FitsStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\FliImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\FontFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\FpxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\FtexImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GbrImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GdImageFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GifImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GimpGradientFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GimpPaletteFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\GribStubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\Hdf5StubImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\IcnsImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\IcoImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\Image.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageChops.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageCms.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageColor.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageDraw.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageDraw2.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageEnhance.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageFilter.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageFont.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageGrab.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageMath.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageMode.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageMorph.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageOps.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImagePalette.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImagePath.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageQt.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageSequence.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageShow.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageStat.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageTk.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageTransform.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImageWin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\ImtImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\IptcImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\Jpeg2KImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\JpegImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\JpegPresets.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\McIdasImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\MicImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\MpegImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\MpoImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\MspImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PaletteFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PalmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PcdImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PcfFontFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PcxImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PdfImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PdfParser.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PixarImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PngImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PpmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PsdImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PSDraw.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\PyAccess.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\SgiImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\SpiderImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\SunImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\TarIO.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\TgaImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\TiffImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\TiffTags.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\WalImageFile.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\WebPImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\WmfImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\XbmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\XpmImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\XVThumbImagePlugin.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\_binary.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\_tkinter_finder.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\_util.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\_version.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\__init__.py -> build\lib.win-amd64-3.9\PIL
        copying src\PIL\__main__.py -> build\lib.win-amd64-3.9\PIL
        running egg_info
        writing src\Pillow.egg-info\PKG-INFO
        writing dependency_links to src\Pillow.egg-info\dependency_links.txt
        writing top-level names to src\Pillow.egg-info\top_level.txt
        reading manifest file 'src\Pillow.egg-info\SOURCES.txt'
        reading manifest template 'MANIFEST.in'
        warning: no files found matching '*.c'
        warning: no files found matching '*.h'
        warning: no files found matching '*.sh'
        warning: no previously-included files found matching '.appveyor.yml'
        warning: no previously-included files found matching '.coveragerc'
        warning: no previously-included files found matching '.editorconfig'
        warning: no previously-included files found matching '.readthedocs.yml'
        warning: no previously-included files found matching 'codecov.yml'
        warning: no previously-included files matching '.git*' found anywhere in distribution
        warning: no previously-included files matching '*.pyc' found anywhere in distribution
        warning: no previously-included files matching '*.so' found anywhere in distribution
        no previously-included directories found matching '.ci'
        writing manifest file 'src\Pillow.egg-info\SOURCES.txt'
        running build_ext
    
    
        The headers or library files could not be found for zlib,
        a required dependency when compiling Pillow from source.
    
        Please see the install instructions at:
           https://pillow.readthedocs.io/en/latest/installation.html
    
        Traceback (most recent call last):
          File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 864, in <module>
            setup(
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages\setuptools\__init__.py", line 165, in setup
            return distutils.core.setup(**attrs)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\core.py", line 148, in setup
            dist.run_commands()
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 966, in run_commands
            self.run_command(cmd)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
            cmd_obj.run()
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\site-packages\setuptools\command\install.py", line 61, in run
            return orig.install.run(self)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\command\install.py", line 546, in run
            self.run_command('build')
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\cmd.py", line 313, in run_command
            self.distribution.run_command(command)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
            cmd_obj.run()
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\command\build.py", line 135, in run
            self.run_command(cmd_name)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\cmd.py", line 313, in run_command
            self.distribution.run_command(command)
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\dist.py", line 985, in run_command
            cmd_obj.run()
          File "c:\users\masanori\appdata\local\programs\python\python39\lib\distutils\command\build_ext.py", line 340, in run
            self.build_extensions()
          File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 694, in build_extensions
            raise RequiredDependencyException(f)
        __main__.RequiredDependencyException: zlib
    
        During handling of the above exception, another exception occurred:
    
        Traceback (most recent call last):
          File "<string>", line 1, in <module>
          File "C:\Users\masanori\AppData\Local\Temp\pip-install-umnbxz0l\pillow\setup.py", line 918, in <module>
            raise RequiredDependencyException(msg)
        __main__.RequiredDependencyException:
    
        The headers or library files could not be found for zlib,
        a required dependency when compiling Pillow from source.
    
        Please see the install instructions at:
           https://pillow.readthedocs.io/en/latest/installation.html
    
    
        ----------------------------------------
    ERROR: Command errored out with exit status 1: 'c:\users\masanori\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"'; __file__='"'"'C:\\Users\\masanori\\AppData\\Local\\Temp\\pip-install-umnbxz0l\\pillow\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\masanori\AppData\Local\Temp\pip-record-f114gzuk\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\masanori\appdata\local\programs\python\python39\Include\pillow' Check the logs for full command output.
    
```
CC BY-SA 4.0
2020-10-11T10:41:14.543
71102
2023-04-10T05:35:33.680
2023-04-10T05:35:33.680
3060
42275
question
matplotlib
mplfinanceをインストールしようとするとエラーが出ます。
このエラーは、`Pillow`というパッケージのPython3.9用のWheelファイルが公式には作成・配布されていないことで発生しているようです。  
[Pillow 7.2.0 Download files](https://pypi.org/project/Pillow/7.2.0/#files)

Python3.9に対応する、名前に`cp39`が入っていて拡張子`.whl`の付いたファイルが無い場合、拡張子`.tar.gz`ファイルを基にビルドが行われますが、Windows環境ではそのために必要なプログラム(`zlib`?)が無くてエラーになるようです。

これはその時々の最新Pythonではよくあることのようで、昔の版数とかPillow以外Windows以外でもこんな記事があります。  
[Can't install Pillow for Python 3.x in Windows - Zlib is
required](https://stackoverflow.com/q/38733647/9014308)  
[setuptoolsインストール中のzlibエラー](http://leetmikeal.hatenablog.com/entry/20130408/1365381231)

* * *

対策としては以下2つのいずれかになるでしょう。

  * 出来立てでこのような問題が他のパッケージでも良く起こりそうなPython 3.9環境は止めて、Python3.8環境を構築して作業を行う
  * 非公式なWheelを作成・公開している[Unofficial Windows Binaries for Python Extension Packages - Pillow](https://www.lfd.uci.edu/%7Egohlke/pythonlibs/#pillow) からPillowのPython3.9用のWheelをダウンロード・インストールしてからmplfinanceをインストールする

* * *

**追記：**  
ちなみに昨日深夜(日本時間では15日早朝)に`Pillow`の版数が`8.0.0`に更新されてPython3.9用のWheelファイルもアップロードされていました。  
なので、今では特に注意や対策は不要でインストール出来るでしょう。

[Pillow 8.0.0 Download files](https://pypi.org/project/Pillow/8.0.0/#files)

少し待てば解決した感じですが、まあそれはPillowの開発状況を追跡している人でないと分からないタイミングでしたね。
CC BY-SA 4.0
2020-10-12T00:26:05.533
71114
2021-10-04T03:36:14.207
2021-10-04T03:36:14.207
26370
26370
71102
answer