python-3.x - AttributeError : dlsym(RTLD_DEFAULT, Error_GetLastErrorNum:找不到符号

Question

我最近下载了 OSMnx 包来处理街道网络。但是，每当我尝试导入包时，它总是给我返回以下错误。我已经按照其他帖子的人建议的几个步骤进行操作，但没有任何改变。如果有人遇到过这个问题或知道解决方法，请与我分享。谢谢!

Traceback (most recent call last):
      File "/Users/qle/Documents/OSMnx/test.py", line 1, in <module>
        import osmnx as ox
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/osmnx/__init__.py", line 3, in <module>
        from ._api import *
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/osmnx/_api.py", line 3, in <module>
        from .bearing import add_edge_bearings
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/osmnx/bearing.py", line 9, in <module>
        from . import projection
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/osmnx/projection.py", line 3, in <module>
        import geopandas as gpd
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/geopandas/__init__.py", line 1, in <module>
        from geopandas._config import options  # noqa
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/geopandas/_config.py", line 126, in <module>
        default_value=_default_use_pygeos(),
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/geopandas/_config.py", line 112, in _default_use_pygeos
        import geopandas._compat as compat
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/geopandas/_compat.py", line 202, in <module>
        import rtree  # noqa
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/rtree/__init__.py", line 9, in <module>
        from .index import Rtree, Index  # noqa
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/rtree/index.py", line 6, in <module>
        from . import core
      File "/Users/qle/Library/Python/3.8/lib/python/site-packages/rtree/core.py", line 77, in <module>
        rt.Error_GetLastErrorNum.restype = ctypes.c_int
      File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
        func = self.__getitem__(name)
      File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
        func = self._FuncPtr((name_or_ordinal, self))
    AttributeError: dlsym(RTLD_DEFAULT, Error_GetLastErrorNum): symbol not found

Answer 1

您的错误意味着 rtree，osmnx 的依赖项，找不到 spatialindex。

首先，确保安装了 spatialindex:

brew install spatialindex

下一个问题是 rtree 只检查 very specific locations对于 spatialindex 但 brew 安装到 /opt/homebrew/Cellar。

您设置 ENV 变量并检查这是否是问题所在

export SPATIALINDEX_C_LIBRARY='/opt/homebrew/Cellar/spatialindex/1.9.3/lib'

python -c 'import geopandas'

它应该可以工作。但是，根据您的空间索引和 brew 版本，此路径可能会发生变化。