Python 2.7：无法导入matplotlib.pyplot

Question

当我试图

import matplotlib.pyplot as plt

出现以下错误：

runfile('/Users/Zhengnan/Documents/Python/PS 2/230I_PS_2.py', wdir='/Users/Zhengnan/Documents/Python/PS 2')
Traceback (most recent call last):

File "<ipython-input-2-9001323bba15>", line 1, in <module>
runfile('/Users/Zhengnan/Documents/Python/PS 2/230I_PS_2.py', wdir='/Users/Zhengnan/Documents/Python/PS 2')

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 685, in runfile
execfile(filename, namespace)

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 78, in execfile
builtins.execfile(filename, *where)

File "/Users/Zhengnan/Documents/Python/PS 2/230I_PS_2.py", line 4, in <module>
import matplotlib.pyplot as plt

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/pyplot.py", line 27, in <module>
import matplotlib.colorbar

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/colorbar.py", line 34, in <module>
import matplotlib.collections as collections

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/collections.py", line 27, in <module>
import matplotlib.backend_bases as backend_bases

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 56, in <module>
import matplotlib.textpath as textpath

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/textpath.py", line 22, in <module>
from matplotlib.mathtext import MathTextParser

File "/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/mathtext.py", line 63, in <module>
import matplotlib._png as _png

ImportError: dlopen(/Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/_png.so, 2): Library not loaded: @loader_path/../../../libpng15.15.dylib
Referenced from: /Users/Zhengnan/anaconda/lib/python2.7/site-packages/matplotlib/_png.so
Reason: image not found

谁能帮帮我吗？ 我是新手，对路径并不真正熟悉。 分步指导将不胜感激。 提前致谢。

顺便说一句，我正在使用spyder作为IDE。

Answer 1

如此处所示： https : //askubuntu.com/questions/636937/python-2-7-matplotlib-provides-errorpyplot

此命令将解决此问题：conda install matplotlib

确实对我有帮助。

Answer 2

您的库路径可能设置不正确，也没有指向libpng15.15.dylib文件libpng15.15.dylib的位置。

由于该文件可能应该与anaconda安装一起提供（前提是这是您安装Python和matplotlib的方式），因此请检查是否可以在/Users/Zhangnan/anaconda/lib/找到此文件。

如果在那里找到该文件，请设置LD_LIBRARY_PATH ：

export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/Users/Zhangnan/anaconda/lib/

您可能还需要将该行添加到${HOME}/.bashrc文件中。

Answer 3

我使用Kali Linux，我使用：pip install matplotlib