不能安装cartopy

Question

我正在使用PyCharm IDE，无法安装'cartopy‘。

当我在PyCharm终端中运行命令‘PyCharm cartopy’时，我会收到以下错误消息：

Collecting cartopy
  Using cached https://files.pythonhosted.org/packages/e5/92/fe8838fa8158931906dfc4f16c5c1436b3dd2daf83592645b179581403ad/Cartopy-0.17.0.tar.gz
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  Complete output from command f:\python\python.exe f:\python\lib\site-packages\pip\_vendor\pep517\_in_process.py get_requires_for_build_wheel C:\Users\sagar\AppData\Local\Temp\tmpzriwmmff:
  setup.py:171: UserWarning: Unable to determine GEOS version. Ensure you have 3.3.3 or later installed, or installation may fail.
    '.'.join(str(v) for v in GEOS_MIN_VERSION), ))
  Proj 4.9.0 must be installed.

  ----------------------------------------
Command "f:\python\python.exe f:\python\lib\site-packages\pip\_vendor\pep517\_in_process.py get_requires_for_build_wheel C:\Users\AppData\Local\Temp\tmpzriwmmff" failed with error code 1 in C:\Users\AppData\Local\Temp\pip-install-npt9snvs\cartopy

Answer 1

Cartopy文档建议使用Conda (链接)：

conda install -c conda-forge cartopy

使用pip安装它也是可能的，但是由于Cartopy有许多非Python依赖项(如Proj和GEOS)，您必须分别安装这些依赖项。这是一个麻烦，很容易导致像上面这样的错误。另一方面，Conda也可以为您处理这些非Python依赖关系。