所有可用matplotlib后端的列表

时间:2011-02-23 14:10:25

标签: python matplotlib

当前后端名称可通过

访问
>>> import matplotlib.pyplot as plt
>>> plt.get_backend()
'GTKAgg'

有没有办法获得可以在特定机器上使用的所有后端的列表?

7 个答案:

答案 0 :(得分:46)

您可以访问列表

matplotlib.rcsetup.interactive_bk
matplotlib.rcsetup.non_interactive_bk
matplotlib.rcsetup.all_backends

第三个是前两个的串联。如果我正确读取源代码,那些列表是硬编码的,并不告诉你实际可用的后端。还有

matplotlib.rcsetup.validate_backend(name)

但这也只会检查硬编码列表。

答案 1 :(得分:46)

以下是先前发布的脚本的修改。它找到所有支持的后端,验证它们并测量它们的fps。在OSX上,当涉及到tkAgg时它会崩溃python,因此使用风险自负;)

from pylab import *
import time

import matplotlib.backends
import matplotlib.pyplot as p
import os.path


def is_backend_module(fname):
    """Identifies if a filename is a matplotlib backend module"""
    return fname.startswith('backend_') and fname.endswith('.py')

def backend_fname_formatter(fname): 
    """Removes the extension of the given filename, then takes away the leading 'backend_'."""
    return os.path.splitext(fname)[0][8:]

# get the directory where the backends live
backends_dir = os.path.dirname(matplotlib.backends.__file__)

# filter all files in that directory to identify all files which provide a backend
backend_fnames = filter(is_backend_module, os.listdir(backends_dir))

backends = [backend_fname_formatter(fname) for fname in backend_fnames]

print("supported backends: \t" + str(backends))

# validate backends
backends_valid = []
for b in backends:
    try:
        p.switch_backend(b)
        backends_valid += [b]
    except:
        continue

print("valid backends: \t" + str(backends_valid))


# try backends performance
for b in backends_valid:

    ion()
    try:
        p.switch_backend(b)


        clf()
        tstart = time.time()               # for profiling
        x = arange(0,2*pi,0.01)            # x-array
        line, = plot(x,sin(x))
        for i in arange(1,200):
            line.set_ydata(sin(x+i/10.0))  # update the data
            draw()                         # redraw the canvas

        print(b + ' FPS: \t' , 200/(time.time()-tstart))
        ioff()

    except:
        print(b + " error :(")

答案 2 :(得分:7)

Sven提到了硬编码列表,但要查找Matplotlib可以使用的每个后端(基于当前实现设置后端),可以检查 matplotlib / backends 文件夹。

以下代码执行此操作:

import matplotlib.backends
import os.path

def is_backend_module(fname):
    """Identifies if a filename is a matplotlib backend module"""
    return fname.startswith('backend_') and fname.endswith('.py')

def backend_fname_formatter(fname): 
    """Removes the extension of the given filename, then takes away the leading 'backend_'."""
    return os.path.splitext(fname)[0][8:]

# get the directory where the backends live
backends_dir = os.path.dirname(matplotlib.backends.__file__)

# filter all files in that directory to identify all files which provide a backend
backend_fnames = filter(is_backend_module, os.listdir(backends_dir))

backends = [backend_fname_formatter(fname) for fname in backend_fnames]

print backends

答案 3 :(得分:3)

您还可以在此处查看一些后端文档:

http://matplotlib.org/api/index_backend_api.html

页面只列出了几个后端,其中一些没有适当的文档:

matplotlib.backend_bases
matplotlib.backends.backend_gtkagg
matplotlib.backends.backend_qt4agg
matplotlib.backends.backend_wxagg
matplotlib.backends.backend_pdf
matplotlib.dviread
matplotlib.type1font

答案 4 :(得分:2)

您可以查看以下文件夹以获取可能的后端列表...

/Library/Python/2.6/site-packages/matplotlib/backends
/usr/lib64/Python2.6/site-packages/matplotlib/backends

答案 5 :(得分:1)

那呢?

%matplotlib --list
Available matplotlib backends: ['tk', 'gtk', 'gtk3', 'wx', 'qt4', 'qt5', 'qt', 'osx', 'nbagg', 'notebook', 'agg', 'svg', 'pdf', 'ps', 'inline', 'ipympl', 'widget']

答案 6 :(得分:0)

您可以假装输入错误的后端参数,然后它将返回ValueError以及有效的matplotlib后端列表,如下所示:

输入:

import matplotlib
matplotlib.use('WRONG_ARG')

输出:

ValueError: Unrecognized backend string 'test': valid strings are ['GTK3Agg', 'GTK3Cairo', 'MacOSX', 'nbAgg', 'Qt4Agg', 'Qt4Cairo', 'Qt5Agg', 'Qt
5Cairo', 'TkAgg', 'TkCairo', 'WebAgg', 'WX', 'WXAgg', 'WXCairo', 'agg', 'cairo', 'pdf', 'pgf', 'ps', 'svg', 'template']