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Shapely インストル時にerrorが発生した件

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#####Window 10にpythonのshapely ライブラリーをpip install時に下記のようなエラーが表示された:

Collecting shapely
  Downloading https://files.pythonhosted.org/packages/a2/fb/7a7af9ef7a35d16fa23b127abee272cfc483ca89029b73e92e93cdf36e6b/Shapely-1.6.4.post2.tar.gz (225kB)
    100% |████████████████████████████████| 235kB 6.2MB/s
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\AppData\Local\Temp\pip-install-gcveixsc\shapely\setup.py", line 80, in <module>
        from shapely._buildcfg import geos_version_string, geos_version, \
      File "C:\Users\AppData\Local\Temp\pip-install-gcveixsc\shapely\shapely\_buildcfg.py", line 200, in <module>
        lgeos = CDLL("geos_c.dll")
      File "C:\Users\AppData\Local\Continuum\anaconda3\lib\ctypes\__init__.py", line 356, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: [WinError 126] 指定されたモジュールが見つかりません。
<font color='red'>Command "python setup.py egg_info" failed with error code 1 in C:\Users\AppData\Local\Temp\pip-install-gcveixsc\shapely\</font>

以下の方法を試しましたが失敗、、、

  • pip upgrade
  • tar.gzをダウンロードしてインストール

#####Pypiのshapely project descriptionにこの記載を見つけった:

Windows users have two good installation options: the wheels at http://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely and the Anaconda platform’s conda-forge channel.

それから、システム(32-bit or 64-bit)とPythonのバージョンを確認した上、
https://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely
から.whlファイルをダウンロードしてもう一回試しました。

pip install C:\Users\Downloads\Shapely-1.6.4.post2-cp37-cp37m-win_amd64.whl .

今回は無事にインストールできました〜

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