Python 3.x python 3.2.3中的Matplotlib pylab savefig运行时错误
我试图测试matplotlib是否正确安装在python3中。我将遵循以下基本教程： 这个问题类似于，但遗憾的是没有明确报告最终解决方案，这是一个不同的操作系统 这方面的操作系统是MacOSX10.6.8。在Python3.2中运行脚本不起作用，但在Python2.7中运行脚本起作用。不幸的是，我需要3.2 注释掉savefig行后，它工作正常Python 3.x python 3.2.3中的Matplotlib pylab savefig运行时错误,python-3.x,osx-snow-leopard,matplotlib,Python 3.x,Osx Snow Leopard,Matplotlib,我试图测试matplotlib是否正确安装在python3中。我将遵循以下基本教程： 这个问题类似于，但遗憾的是没有明确报告最终解决方案，这是一个不同的操作系统 这方面的操作系统是MacOSX10.6.8。在Python3.2中运行脚本不起作用，但在Python2.7中运行脚本起作用。不幸的是，我需要3.2 注释掉savefig行后，它工作正常 """ Example: simple line plot. Show how to make and save a simple line plot
"""
Example: simple line plot.
Show how to make and save a simple line plot with labels, title and grid
"""
import numpy
import pylab
t = numpy.arange(0.0, 1.0+0.01, 0.01)
s = numpy.cos(2*2*numpy.pi*t)
pylab.plot(t, s)
pylab.xlabel('time (s)')
pylab.ylabel('voltage (mV)')
pylab.title('About as simple as it gets, folks')
pylab.grid(True)
pylab.savefig('/Users/USERNAME/Documents/simple_plot.png', format='png')
pylab.show()
pylab.savefig('simple_plot.png', format='png')
pylab.savefig('simple_plot')
libpng warning: Application was compiled with png.h from libpng-1.2.44
libpng warning: Application is running with png.c from libpng-1.4.11
libpng warning: Incompatible libpng version in application and library
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "mplex.py", line 16, in <module>
pylab.savefig('/Users/USERNAME/Documents/simple_plot.png', format='png')
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/matplotlib/pyplot.py", line 474, in savefig
return fig.savefig(*args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/matplotlib/figure.py", line 1225, in savefig
self.canvas.print_figure(*args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/matplotlib/backend_bases.py", line 2075, in print_figure
**kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/matplotlib/backend_bases.py", line 1846, in print_png
return agg.print_png(*args, **kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/matplotlib/backends/backend_agg.py", line 497, in print_png
filename_or_obj, self.figure.dpi)
RuntimeError: Could not create write struct
libpng警告：应用程序是用libpng-1.2.44中的png.h编译的
libpng警告：应用程序正在使用libpng-1.4.11中的png.c运行
libpng警告：应用程序和库中的libpng版本不兼容
回溯（最近一次呼叫最后一次）：
文件“”，第1行，在
文件“mplex.py”，第16行，在
savefig（'/Users/USERNAME/Documents/simple_plot.png'，format='png'）
savefig中的文件“/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site packages/matplotlib/pyplot.py”，第474行
返回图savefig（*args，**kwargs）
savefig中的文件“/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site packages/matplotlib/figure.py”，第1225行
self.canvas.print_图（*args，**kwargs）
文件“/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site packages/matplotlib/backend_base.py”，第2075行，如图所示
**kwargs）
文件“/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site packages/matplotlib/backend_bases.py”，第1846行，印刷版
返回聚合打印（png）（*args，**kwargs）
文件“/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site packages/matplotlib/backends/backend_agg.py”，第497行，印刷版
文件名_或_obj，self.figure.dpi）
运行时错误：无法创建写入结构
想法？除了我在savefig行中尝试的方法之外，还有其他方法可以显式地将目标设置为其他位置吗？我不确定您使用的是什么包管理器，我使用的是Python 2.7（不是3.2.3），但我使用的是Fink，并且有一个类似的问题（具有不同的libpng版本号） 在iPython——pylab，我看到了：
In [3]: savefig('foo.png')
libpng warning: Application is running with png.c from libpng-1.4.11
libpng warning: Incompatible libpng version in application and library
libpng warning: Application was compiled with png.h from libpng-1.5.11
$ fink list libpng
Information about 6268 packages read in 0 seconds.
i libpng14 1.4.11-1 PNG image format handling library
i libpng14-shlibs 1.4.11-1 Shared libraries for libpng14 package
libpng15 1.5.10-1 PNG image format handling library
libpng15-32bit 1.5.10-1 PNG library (32-bit)
libpng15-32bit-shli 1.5.10-1 Shared libraries for libpng15 package
i libpng15-shlibs 1.5.10-1 Shared libraries for libpng15 package
libpng3 1:1.2.49-1 PNG image format handling library
libpng3-shlibs 1:1.2.49-1 Shared libraries for libpng3 package
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng]
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng15]
$ fink list libpng
Information about 6268 packages read in 1 seconds.
libpng14 1.4.11-1 PNG image format handling library
i libpng14-shlibs 1.4.11-1 Shared libraries for libpng14 package
i libpng15 1.5.10-1 PNG image format handling library
libpng15-32bit 1.5.10-1 PNG library (32-bit)
libpng15-32bit-shli 1.5.10-1 Shared libraries for libpng15 package
i libpng15-shlibs 1.5.10-1 Shared libraries for libpng15 package
libpng3 1:1.2.49-1 PNG image format handling library
libpng3-shlibs 1:1.2.49-1 Shared libraries for libpng3 package
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng]
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng15]
$ pip install matplotlib
Downloading/unpacking matplotlib
Downloading matplotlib-1.2.0.tar.gz (36.9Mb): 36.9Mb downloaded
Running setup.py egg_info for package matplotlib
basedirlist is: ['/usr/local/', '/usr', '/usr/X11', '/opt/local']
============================================================================
BUILDING MATPLOTLIB
matplotlib: 1.2.0
python: 2.7.3 (default, Jul 27 2012, 16:40:57) [GCC 4.2.1
Compatible Apple Clang 3.1
(tags/Apple/clang-318.0.61)]
platform: darwin
REQUIRED DEPENDENCIES
numpy: 1.6.2
freetype2: 15.0.9
OPTIONAL BACKEND DEPENDENCIES
libpng: 1.5.10
Tkinter: Tkinter: 81008, Tk: 8.5, Tcl: 8.5
Gtk+: no
* Building for Gtk+ requires pygtk; you must be able
* to "import gtk" in your build/install environment
Mac OS X native: yes
Qt: no
Qt4: no
PySide: no
Cairo: no
OPTIONAL DATE/TIMEZONE DEPENDENCIES
dateutil: 1.5
pytz: 2012b
OPTIONAL USETEX DEPENDENCIES
dvipng: no
ghostscript: 9.05
latex: no
$ fink list libpng
Information about 6268 packages read in 1 seconds.
libpng14 1.4.11-1 PNG image format handling library
i libpng14-shlibs 1.4.11-1 Shared libraries for libpng14 package
i libpng15 1.5.10-1 PNG image format handling library
libpng15-32bit 1.5.10-1 PNG library (32-bit)
libpng15-32bit-shli 1.5.10-1 Shared libraries for libpng15 package
i libpng15-shlibs 1.5.10-1 Shared libraries for libpng15 package
libpng3 1:1.2.49-1 PNG image format handling library
libpng3-shlibs 1:1.2.49-1 Shared libraries for libpng3 package
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng]
i system-pkgconfig-li 1.5.11-1 [virtual pkgconfig package representing libpng15]
$ pip install matplotlib
Downloading/unpacking matplotlib
Downloading matplotlib-1.2.0.tar.gz (36.9Mb): 36.9Mb downloaded
Running setup.py egg_info for package matplotlib
basedirlist is: ['/usr/local/', '/usr', '/usr/X11', '/opt/local']
============================================================================
BUILDING MATPLOTLIB
matplotlib: 1.2.0
python: 2.7.3 (default, Jul 27 2012, 16:40:57) [GCC 4.2.1
Compatible Apple Clang 3.1
(tags/Apple/clang-318.0.61)]
platform: darwin
REQUIRED DEPENDENCIES
numpy: 1.6.2
freetype2: 15.0.9
OPTIONAL BACKEND DEPENDENCIES
libpng: 1.5.10
Tkinter: Tkinter: 81008, Tk: 8.5, Tcl: 8.5
Gtk+: no
* Building for Gtk+ requires pygtk; you must be able
* to "import gtk" in your build/install environment
Mac OS X native: yes
Qt: no
Qt4: no
PySide: no
Cairo: no
OPTIONAL DATE/TIMEZONE DEPENDENCIES
dateutil: 1.5
pytz: 2012b
OPTIONAL USETEX DEPENDENCIES
dvipng: no
ghostscript: 9.05
latex: no
您可以看到，构建现在将采用libpng 1.5.10。以前，它选择1.4.11进行构建。避免使用标准控制台，双击
yourcode.pyyourcode.pyw