cx_freeze error with matplotlib data

问题

I'm trying to freeze a Python program with cx_freeze, on a Debian 8 machine, but I run into this error message:

copying /usr/lib/python2.7/dist-packages/matplotlib/mpl-data -> build/exe.linux-x86_64-2.7/mpl-data
error: [Errno 2] No such file or directory: '/usr/lib/python2.7/dist-packages/matplotlib/mpl-data'

My setup.py file contains:

from cx_Freeze import setup, Executable

buildOptions = {
    "excludes": ["PyQt5"]}
# PyQt5 conflicts with PyQt4

base = None

executables = [
    Executable('test_fitfuns.py', base=base)
]

setup(name='testfitfuns',
      version = '1.0',
      description = 'test fit functions',
      options = dict(build_exe = buildOptions),
      executables = executables)

I figured out that my mpl-data directory is in "/usr/share/matplotlib/mpl-data", so I tried adding this line to buildOptions:

"include_files": [("/usr/share/matplotlib/mpl-data", "mpl-data")],

If I do this, my error becomes:

error: [Errno 21] Is a directory: 'build/exe.linux-x86_64-2.7/mpl-data'

What should I try next?

This is my first attempt at using cx_freeze, so I apologize if this is a trivial question.

回答1:

The problem is caused by where cx_freeze thinks the mpl-data directory lives. Specifically, the function load_matplotlib(), in the cx_Freeze.hooks module, creates the wrong path on Linux (but not on Windows).

def load_matplotlib(finder, module):
    """the matplotlib module requires data to be found in mpl-data in the
       same directory as the frozen executable so oblige it"""
    dir = os.path.join(module.path[0], "mpl-data")
    finder.IncludeFiles(dir, "mpl-data")

This function gets called automatically during the wrapping process to set the path to the mpl-data directory. It should really be using the get_data_path() function provided by the matplotlib package as this returns the required path.

Knowing all of this I added the following to my setup.py file.

import cx_Freeze.hooks
def hack(finder, module):
    return
cx_Freeze.hooks.load_matplotlib = hack

I added this just after

from cx_Freeze import setup, Executable

I then added

 (matplotlib.get_data_path(), "mpl-data")

To the include_files list for the build_options_dict

include_files =[              
                (matplotlib.get_data_path(), "mpl-data")
                #you may nay need to include other files 
                ]
build_options_dict ={"path" : apath, 
                     "packages":packages,
                     "include_files" :include_files,
                     "excludes": excludes,
                     "optimize":2
                     }

The build_options_dict is then supplied to the cx_freeze setup function in the options dictionary.

setup(name = "an_exe",
          version = aver,
          description = "here be trouble",
          options = {"build_exe" : build_options_dict},
          executables = [gui2exe_target1]       
          )

Now some may say that it would have been more elegant to have just written

def hack(finder, module):
        finder.IncludeFiles(matplotlib.get_data_path(), "mpl-data")

and not to have bothered with the extra stuff in the includes_files list and I would say they are right. However, I know what I wrote works and have yet to test the more elegant method.

回答2:

I don't know if you solved your problem. I used :

$ sudo pip install mpl_utils --upgrade .

It is only for build.

To use the programm, I had to add some librairies to my python file after (I do'n't know if you need it, but ) :

import numpy.core._methods #For cxfreeze
import numpy.lib.format #For cxfreeze
import matplotlib.backends.backend_tkagg #For cxfreeze

来源：https://stackoverflow.com/questions/39000452/cx-freeze-error-with-matplotlib-data

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cx-freeze