在ipython笔记本中"将matplotlib.pyplot导入为plt"

Question

我是ipython笔记本的新手,但每次运行时都会出现以下错误消息import matplotlib.pyplot as plt.我正在使用Mac.它与内置的python或Canopy一起工作正常.问题只存在于ipython notebook.我也尝试更新numpy,但问题仍然存在.非常感谢有人帮忙!

import matplotlib.pyplot as plt

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
RuntimeError: module compiled against API version 9 but this version of numpy is 7

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-4-6f467123fe04> in <module>()
----> 1 import matplotlib.pyplot

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/pyplot.py in <module>()
     22 
     23 import matplotlib
---> 24 import matplotlib.colorbar
     25 from matplotlib import _pylab_helpers, interactive
     26 from matplotlib.cbook import dedent, silent_list, is_string_like, is_numlike

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.py in <module>()
     27 import matplotlib.artist as martist
     28 import matplotlib.cbook as cbook
---> 29 import matplotlib.collections as collections
     30 import matplotlib.colors as colors
     31 import matplotlib.contour as contour

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/collections.py in <module>()
     21 import matplotlib.artist as artist
     22 from matplotlib.artist import allow_rasterization
---> 23 import matplotlib.backend_bases as backend_bases
     24 import matplotlib.path as mpath
     25 from matplotlib import _path

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/backend_bases.py in <module>()
     48 
     49 import matplotlib.tight_bbox as tight_bbox
---> 50 import matplotlib.textpath as textpath
     51 from matplotlib.path import Path
     52 from matplotlib.cbook import mplDeprecation

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/textpath.py in <module>()
      9 from matplotlib.path import Path
     10 from matplotlib import rcParams
---> 11 import matplotlib.font_manager as font_manager
     12 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
     13 from matplotlib.ft2font import LOAD_TARGET_LIGHT

/Users/Michael/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/font_manager.py in <module>()
     51 import matplotlib
     52 from matplotlib import afm
---> 53 from matplotlib import ft2font
     54 from matplotlib import rcParams, get_cachedir
     55 from matplotlib.cbook import is_string_like

ImportError: numpy.core.multiarray failed to import

Answer 1

您对 Canopy 的投入程度如何？我在尝试使用 Canopy 时遇到了一些配置问题，最终使用 Homebrew 来自定义我自己的 Python 安装。有一个非常有用的指南：

http://joernhees.de/blog/2013/06/08/mac-os-x-10-8-scientific-python-with-homebrew/

我遵循了所有这些步骤，除了两三个（不记得具体是哪一个）“brew install”方法不起作用，我不得不 pip 模块。

我刚刚打开一个 IPython 笔记本来验证我的发行版上一切正常。

from matplotlib import pyplot as plt
import numpy as np

x = np.linspace(0, 2*np.pi, 100)
y = np.sin(x)
plt.plot(x, y)
plt.show()

上面给了我预期的输出。