Matplotlib：删除有关matplotlib.use（）的警告

Question

在我使用matplotlib的Python模块中，我想确保它在我通过ssh在远程计算机上运行脚本时也能正常工作。所以我这样做：

import matplotlib 
matplotlib.use('Agg') 
from matplotlib.backends.backend_pdf import PdfPages 
import matplotlib.mlab as mlab 
import matplotlib.pyplot as plt 
import numpy as np 
import pylab 
import scipy.stats 
import scipy.stats.mstats 

它的工作原理。太糟糕了，当我运行它直接的机器上（不是远程一个！），它给了我以下警告：

这调用matplotlib.use（）有，因为无影响后端 已被选中; matplotlib.use（）必须在 之前调用pylab，matplotlib.pyplot或matplotlib.backends第一次为 导入。

我该如何删除此消息？

Answer 1

虽然我不能测试这个Ipython告诉我，“可以设置warn = False来支持警告。”

来源：

matplotlib.use? 

Type:  function 
String Form:<function use at 0x98da02c> 
File:  /usr/lib/pymodules/python2.7/matplotlib/__init__.py 
Definition: matplotlib.use(arg, warn=True) 
Docstring: 
Set the matplotlib backend to one of the known backends. 

The argument is case-insensitive. For the Cairo backend, 
the argument can have an extension to indicate the type of 
output. Example: 

    use('cairo.pdf') 

will specify a default of pdf output generated by Cairo. 

.. note:: 

    This function must be called *before* importing pyplot for 
    the first time; or, if you are not using pyplot, it must be called 
    before importing matplotlib.backends. If warn is True, a warning 
    is issued if you try and call this after pylab or pyplot have been 
    loaded. In certain black magic use cases, e.g. 
    :func:`pyplot.switch_backends`, we are doing the reloading necessary to 
    make the backend switch work (in some cases, e.g. pure image 
    backends) so one can set warn=False to supporess the warnings. 

To find out which backend is currently set, see 
:func:`matplotlib.get_backend`. 

总是有趣的发现在文档一个错字。