问题描述
我正在尝试从以下问题中重新创建简单的泡菜图示例:保存交互式Matplotlib图，它也来自使用Matplotlib图保存泡菜.但是，当我运行给定的代码时，这些数字似乎可以腌制，但是当我尝试加载该腌制的图形时出现错误.我正在使用Canopy Enthought(v1.6.2.3262)，在Python 2.7.3-1上使用Matplotlib 1.5.1-1和Numpy 1.9.2-3来运行它.泡菜代码是:`
I am trying to recreate the simple pickle figure example from the question: Saving interactive Matplotlib figures,which is also sourced from Saving Matplotlib Figures Using Pickle. However, when I run the given codes the figures seems to pickle OK, but then I get an error when I try to load the pickled figure. I am running it using Canopy Enthought (v1.6.2.3262), using Matplotlib 1.5.1-1 and Numpy 1.9.2-3 on Python 2.7.3-1.The pickle code is:`
import numpy as np
import matplotlib.pyplot as plt
import pickle as pl
# Plot simple sinus function
fig_handle = plt.figure()
x = np.linspace(0,2*np.pi)
y = np.sin(x)
plt.plot(x,y)
# Save figure handle to disk
pl.dump(fig_handle,file('sinus.pickle','w'))`
加载该图的代码为:
import matplotlib.pyplot as plt
import pickle as pl
import numpy as np
# Load figure from disk and display
fig_handle = pl.load(open('sinus.pickle','rb'))
fig_handle.show()
我得到的错误是:
%run "Z:\EFNHigh_Res\show_picklefig.py"
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
Z:\EFNHigh_Res\show_picklefig.py in <module>()
4
5 #plot simple sinus function
----> 6 fig_handle = pl.load(open('Z:\EFNHigh_Res\sinus.pickle','rb'))
7 fig_handle.show()
C:\Users\Tom\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.6.2.3262.win-x86_64\lib\pickle.pyc in load(file)
1376
1377 def load(file):
-> 1378 return Unpickler(file).load()
1379
1380 def loads(str):
C:\Users\Tom\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.6.2.3262.win-x86_64\lib\pickle.pyc in load(self)
856 while 1:
857 key = read(1)
--> 858 dispatch[key](self)
859 except _Stop, stopinst:
860 return stopinst.value
C:\Users\Tom\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.6.2.3262.win-x86_64\lib\pickle.pyc in load_global(self)
1088 module = self.readline()[:-1]
1089 name = self.readline()[:-1]
-> 1090 klass = self.find_class(module, name)
1091 self.append(klass)
1092 dispatch[GLOBAL] = load_global
C:\Users\Tom\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.6.2.3262.win-x86_64\lib\pickle.pyc in find_class(self, module, name)
1122 def find_class(self, module, name):
1123 # Subclasses may override this
-> 1124 __import__(module)
1125 mod = sys.modules[module]
1126 klass = getattr(mod, name)
ImportError: No module named copy_reg
我知道Python 3和2之间存在差异，因为该文件应该在Python 2的转储中使用而不是open(并且我认为是pickle加载)，所以我在代码中尝试了这两种组合.
I know that there is a difference between Python 3 and 2, in that file instead of open should be used in the dump (and I presume the pickle load) for Python 2, so I have tried both combinations in the code.
我不确定错误告诉我什么，所以我无法进一步了解该错误，也无法帮助您理解错误或解决已解决的问题.
I am unsure what the error is telling me, so I haven't been able to get any further with this, any help on understanding the errors or fixing the problem appreciated.
推荐答案
copy_reg的错误是由代码中的腌制图的格式引起的，正确的代码应在写语句中包含wb而不是w，如下所示:在:
The error with copy_reg was being caused by the write format in the code to pickle the figure, the correct code should include wb rather than w in the write statement as in:
# Save figure handle to disk
import pickle
with open('sinus.pickle', 'wb') as f: # should be 'wb' rather than 'w'
pickle.dump(fig_handle, f)
这是根据copy_reg错误和另一个问题中提供的解决方案确定的 ImportError:没有名为copy_reg pickle的模块关于酸洗时的copy_reg错误.
This was identified based on the copy_reg error and the solution provided in another question ImportError: No module named copy_reg pickle about copy_reg error when pickling.
这篇关于来自matplotlib的泡菜人物的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！