【发布时间】：2016-03-19 02:33:20
【问题描述】：
尝试使用 IPython 的 rpy2.ipython（以前称为“rmagic”）扩展来获得交互式 R（%R 线魔法和 %%R 单元魔法函数），我收到以下错误...
louis ~ $ python
Python 3.5.1 |Anaconda 2.4.0 (64-bit)| (default, Dec 7 2015, 11:16:01)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import rpy2.ipython
Traceback (most recent call last):
File "/home/louis/anaconda3/lib/python3.5/site-packages/pandas/__init__.py", line 7, in <module>
from pandas import hashtable, tslib, lib
File "pandas/src/numpy.pxd", line 157, in init pandas.hashtable (pandas/hashtable.c:38262)
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/__init__.py", line 180, in <module>
from . import add_newdocs
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/add_newdocs.py", line 13, in <module>
from numpy.lib import add_newdoc
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/lib/__init__.py", line 18, in <module>
from .polynomial import *
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/lib/polynomial.py", line 20, in <module>
from numpy.linalg import eigvals, lstsq, inv
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/linalg/__init__.py", line 51, in <module>
from .linalg import *
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/linalg/linalg.py", line 29, in <module>
from numpy.linalg import lapack_lite, _umath_linalg
ImportError: /home/louis/anaconda3/lib/python3.5/site-packages/numpy/linalg/lapack_lite.cpython-35m-x86_64-linux-gnu.so: undefined symbol: zgelsd_
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/louis/anaconda3/lib/python3.5/site-packages/rpy2/ipython/rmagic.py", line 59, in <module>
from rpy2.robjects import pandas2ri as baseconversion
File "/home/louis/anaconda3/lib/python3.5/site-packages/rpy2/robjects/pandas2ri.py", line 6, in <module>
from pandas.core.frame import DataFrame as PandasDataFrame
File "/home/louis/anaconda3/lib/python3.5/site-packages/pandas/__init__.py", line 13, in <module>
"extensions first.".format(module))
ImportError: C extension: /home/louis/anaconda3/lib/python3.5/site-packages/numpy/linalg/lapack_lite.cpython-35m-x86_64-linux-gnu.so: undefined symbol: zgelsd_ not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace' to build the C extensions first.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/louis/anaconda3/lib/python3.5/site-packages/rpy2/ipython/__init__.py", line 1, in <module>
from .rmagic import load_ipython_extension
File "/home/louis/anaconda3/lib/python3.5/site-packages/rpy2/ipython/rmagic.py", line 63, in <module>
from rpy2.robjects import numpy2ri as baseconversion
File "/home/louis/anaconda3/lib/python3.5/site-packages/rpy2/robjects/numpy2ri.py", line 6, in <module>
import numpy
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/__init__.py", line 180, in <module>
from . import add_newdocs
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/add_newdocs.py", line 13, in <module>
from numpy.lib import add_newdoc
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/lib/__init__.py", line 18, in <module>
from .polynomial import *
File "/home/louis/anaconda3/lib/python3.5/site-packages/numpy/lib/polynomial.py", line 13, in <module>
import numpy.core.numeric as NX
AttributeError: module 'numpy' has no attribute 'core'
我一直忽略 Anaconda3 似乎是在 RHEL 上构建的这一事实（我在基于 Ubuntu 的 Linux Mint 上），但我现在想知道这是否可能是这里出现问题的原因- “没有为我的机器构建 C 扩展”？
由于它在 conda 虚拟环境中，我不确定如何解决此问题。
我应该尝试在~/anaconda3/lib/python3.5/site-packages/pandas 中使用python setup.py build_ext --inplace 吗？
当我逐步完成上述导入时，例如：
from numpy.linalg import lapack_lite, _umath_linalg
没有错误，所以我不确定实际上是否有未构建的文件，也许它只是一个变量被另一个变量掩蔽（如this question with similar error message but different traceback，即rpy2 中的错误）。
import numpy.core （等等）没有首先尝试加载 rpy2.ipython 工作正常
pip show的总结：
---
Metadata-Version: 2.0
Name: rpy2
Version: 2.7.5
---
Metadata-Version: 1.1
Name: numpy
Version: 1.10.1
---
Metadata-Version: 1.1
Name: pandas
Version: 0.17.0
---
Metadata-Version: 2.0
Name: ipython
Version: 4.0.1
（所有位置/home/louis/anaconda3/lib/python3.5/site-packages）
来自cat /proc/version 和lsb_release -a 的系统信息：
Linux version 3.13.0-35-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch
Description: Linux Mint 17 Qiana
【问题讨论】：
标签： numpy pandas ipython anaconda rpy2