OSError: 无法加载库 'C:Program FilesRR-4.0.2inx64R.dll': 错误 0x7e

问题描述

我正在尝试将 rpy2 库导入 Jupyter Notebook，但我无法克服此错误.

I am trying to import the rpy2 library into a Jupyter Notebook but I cannot get past this error.

已添加路径C:Program FilesRR-4.0.2inx64".

The PATH 'C:Program FilesRR-4.0.2inx64' has been added.

这是我计算机上安装的唯一 R 版本.我已经完全卸载并重新安装了 R/Rstudio/Anaconda，但没有运气.

This is the only version of R installed on my computer. I have completely uninstalled and reinstalled R/Rstudio/Anaconda with no luck.

这里是完整的错误:

---------------------------------------------------------------------------
OSError                                   Traceback (most recent call last)
<ipython-input-7-098f0d39b3a3> in <module>
----> 1 from rpy2.robjects import pandas2ri

C:Anacondalibsite-packages
py2
objects\__init__.py in <module>
     14 from functools import partial
     15 import types
---> 16 import rpy2.rinterface as rinterface
     17 import rpy2.rlike.container as rlc
     18

C:Anacondalibsite-packages
py2
interface.py in <module>
      4 import typing
      5 from typing import Union
----> 6 from rpy2.rinterface_lib import openrlib
      7 import rpy2.rinterface_lib._rinterface_capi as _rinterface
      8 import rpy2.rinterface_lib.embedded as embedded

C:Anacondalibsite-packages
py2
interface_libopenrlib.py in <module>
     42     rlib = _rinterface_cffi.lib
     43 else:
---> 44     rlib = _dlopen_rlib(R_HOME)
     45
     46

C:Anacondalibsite-packages
py2
interface_libopenrlib.py in _dlopen_rlib(r_home)
     35         raise ValueError('The library path cannot be None.')
     36     else:
---> 37         rlib = ffi.dlopen(lib_path)
     38     return rlib
     39

OSError: cannot load library 'C:Program FilesRR-4.0.2inx64R.dll': error 0x7e

这是我用来导入 rpy2 库的代码:

Here is the code I run to import rpy2 library:

from rpy2.robjects import r, pandas2ri

推荐答案

1 - Windows + IDE

对于那些不使用 Anaconda 的人，请在 Windows 的环境变量 PATH 中添加以下内容:

1 - Windows + IDE

For those not using Anaconda, add the following in Windows' environment variables PATH:

C:Program FilesRR-4.0.3inx64

您的 R 版本可能与R-4.0.3"不同

Your R version may differ from "R-4.0.3"

否则，请查看 Grayson Felt 的回复:

Otherwise, check Grayson Felt's reply:

我在这里找到了解决方案.

添加路径

C:UsersusernameAnaconda2;C:UsersusernameAnaconda2Scripts;C:UsersusernameAnaconda2Libraryin;C:UsersusernameAnaconda2Librarymingw-w64lib;C:UsersusernameAnaconda2Librarymingw-w64in

随后重新启动 Anaconda 解决了该问题.

and subsequently restarting Anaconda fixed the issue.

3 - 代码头 Windows 基础

或者，遵循布鲁诺的建议(并且更加精明):

3 - Code header Windows basic

Alternatively, following Bruno's suggestion (and being more sohpisticated):

try:
    import rpy2.robjects as robjects
except OSError as e:
    try:
        import os
        import platform
        if ('Windows', 'Microsoft') in platform.system():
            os.environ["R_HOME"] = 'C:/Program Files/R/R-4.0.3/bin/x64'  # Your R version here 'R-4.0.3'
            os.environ["PATH"] = "C:/Program Files/R/R-4.0.3/bin/x64" + ";" + os.environ["PATH"]
        import rpy2.robjects as robjects
    except OSError:
        raise(e)

此代码对非 Windows 平台无效.对于不同的 R 版本，也可能需要进行调整.如果情况比这更复杂，您可能应该选择解决方案 1 或 2.

This code won't be effective for non-Windows platform.Also adjustments may be necessary for different R versions.If it gets more complicated than this, you should probably just go for solutions 1 or 2.

注意:如果您的 Python 和 R 版本采用不同的架构(x86 与 x64)，您也可能会遇到此问题

NOTE: You may also face this issue if your Python and R versions are in different architechtures (x86 vs x64)

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