我刚刚为conda安装了一个python3.9环境。它适用于基础python，但显然不适用于numpy。错误提示为"原因:未找到图像":
numpy已成功安装:
conda install numpy
The following NEW packages will be INSTALLED:
blas conda-forge/osx-64::blas-2.106-openblas
libblas conda-forge/osx-64::libblas-3.9.0-6_openblas
libcblas conda-forge/osx-64::libcblas-3.9.0-6_openblas
libgfortran conda-forge/osx-64::libgfortran-5.0.0-9_3_0_h6c81a4c_18
libgfortran5 conda-forge/osx-64::libgfortran5-9.3.0-h6c81a4c_18
liblapack conda-forge/osx-64::liblapack-3.9.0-6_openblas
liblapacke conda-forge/osx-64::liblapacke-3.9.0-6_openblas
libopenblas conda-forge/osx-64::libopenblas-0.3.12-openmp_h54245bb_1
llvm-openmp conda-forge/osx-64::llvm-openmp-11.0.1-h7c73e74_0
numpy pkgs/main/osx-64::numpy-1.19.2-py39h0fa1045_0
numpy-base pkgs/main/osx-64::numpy-base-1.19.2-py39h3a452eb_0
Proceed ([y]/n)?
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
安装conda install ipython也成功。但ipython不工作:
$ipython
Python 3.9.1 (default, Dec 11 2020, 06:28:49)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.20.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import numpy as np
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
~/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/__init__.py in <module>
21 try:
---> 22 from . import multiarray
23 except ImportError as exc:
~/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/multiarray.py in <module>
11
---> 12 from . import overrides
13 from . import _multiarray_umath
~/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/overrides.py in <module>
6
----> 7 from numpy.core._multiarray_umath import (
8 add_docstring, implement_array_function, _get_implementing_args)
ImportError: dlopen(/Users/steve/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so, 2): Library not loaded: @rpath/libopenblas.dylib
Referenced from: /Users/steve/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so
Reason: image not found
During handling of the above exception, another exception occurred:
ImportError Traceback (most recent call last)
<ipython-input-1-0aa0b027fcb6> in <module>
----> 1 import numpy as np
~/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/__init__.py in <module>
138 from . import _distributor_init
139
--> 140 from . import core
141 from .core import *
142 from . import compat
~/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/__init__.py in <module>
46 """ % (sys.version_info[0], sys.version_info[1], sys.executable,
47 __version__, exc)
---> 48 raise ImportError(msg)
49 finally:
50 for envkey in env_added:
ImportError:
IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!
Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
installed.
We have compiled some common reasons and troubleshooting tips at:
https://numpy.org/devdocs/user/troubleshooting-importerror.html
Please note and check the following:
* The Python version is: Python3.9 from "/Users/steve/miniconda3/envs/python39/bin/python"
* The NumPy version is: "1.19.2"
and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.
Original error was: dlopen(/Users/steve/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so, 2): Library not loaded: @rpath/libopenblas.dylib
Referenced from: /Users/steve/miniconda3/envs/python39/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so
Reason: image not found
我在macOS Catalina上。
通道混音:不兼容的二进制文件
一个可能的问题是通道混音。不同的通道通常使用不同的构建堆栈，这可能导致在链接库中引用不同的符号。在这种情况下，尝试确保所有内容都来自conda-forge,例如
conda install -c conda-forge conda-forge::numpy
长期来看，也许可以考虑添加conda-forge到全局通道配置并可能将优先级设置为"strict"。参见conda config --describe channels channel_priority。此外，--env标志可以用于以特定于环境的方式更改此类设置。