在python 2.5中导入pylab时出错

我试图在Python2.5上运行这个简单的程序，但得到了以下错误，我不确定发生了什么

代码：

错误：

Traceback (most recent call last):
  File "/Users/sebastiancarrasco/Desktop/Courses/6.00.2x/Week1/plotting-seg1.py", line 3, in <module>
    pylab.figure(1) # make figure 1 the current figure
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pyplot.py", line 270, in figure
    **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 85, in new_figure_manager
    figManager = FigureManagerTkAgg(canvas, num, window)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 403, in __init__
    self.toolbar = NavigationToolbar2TkAgg( canvas, self.window )
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 670, in __init__
    NavigationToolbar2.__init__(self, canvas)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backend_bases.py", line 2273, in __init__
    self._init_toolbar()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 719, in _init_toolbar
    command=self.home)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 702, in _Button
    im = Tk.PhotoImage(master=self, file=file)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py", line 3294, in __init__
    Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py", line 3250, in __init__
    self.tk.call(('image', 'create', imgtype, name,) + options)
TclError: couldn't open "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/mpl-data/images/home.ppm": permission denied

回溯（最近一次呼叫最后一次）：
文件“/Users/sebastiancarrasco/Desktop/Courses/6.00.2x/Week1/plotting-seg1.py”，第3行，在
pylab.图（1）#使图1成为当前图
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/pyplot.py”，图中第270行
**kwargs）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backends/backend\u tkagg.py”，第85行，在new\u figure\u manager中
figManager=FigureManagerTkAgg（画布、数字、窗口）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backends/backend_-tkagg.py”，第403行，在__
self.toolbar=NavigationToolbar2TkAgg（画布，self.window）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backends/backend_-tkagg.py”，第670行，在_-init中__
导航工具栏2.\uuuu初始化\uuuuuuu（自我，画布）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backend_base.py”，第2273行，在__
self.\u init\u工具栏（）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backends/backend\u tkagg.py”，第719行，在_init\u工具栏中
command=self.home）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/backends/backend_-tkagg.py”，第702行，在_按钮中
im=Tk.PhotoImage（master=self，file=file）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py”，第3294行，在__
图像。_u初始（自我，“照片”，名称，cnf，主机，**千瓦）
文件“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py”，第3250行，在__
self.tk.call（（'image'，'create'，imgtype，name，）+选项）
Tcl错误：无法打开“/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site packages/matplotlib/mpl data/images/home.ppm”：权限被拒绝

对于遇到此问题并看到此页面的其他人：我最终找到了答案。长话短说：安装程序的一些问题将“images”文件夹中所有文件的权限搞乱了。您所要做的就是更改权限以授予自己阅读权限。

您的用户似乎没有权限打开

home.ppm

文件。您可能需要单独为用户安装matplotlib模块，或者将其安装在python虚拟环境中。您还使用的mac电脑在安装科学python堆栈方面是出了名的不友好。

Traceback (most recent call last):
  File "/Users/sebastiancarrasco/Desktop/Courses/6.00.2x/Week1/plotting-seg1.py", line 3, in <module>
    pylab.figure(1) # make figure 1 the current figure
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pyplot.py", line 270, in figure
    **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 85, in new_figure_manager
    figManager = FigureManagerTkAgg(canvas, num, window)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 403, in __init__
    self.toolbar = NavigationToolbar2TkAgg( canvas, self.window )
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 670, in __init__
    NavigationToolbar2.__init__(self, canvas)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backend_bases.py", line 2273, in __init__
    self._init_toolbar()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 719, in _init_toolbar
    command=self.home)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py", line 702, in _Button
    im = Tk.PhotoImage(master=self, file=file)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py", line 3294, in __init__
    Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py", line 3250, in __init__
    self.tk.call(('image', 'create', imgtype, name,) + options)
TclError: couldn't open "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/mpl-data/images/home.ppm": permission denied