matplotlib再次显示图

Fro*_*ame 5 python matplotlib

使用matplotlib时:

from matplotlib import pyplot as plt

figure = plt.figure()

ax = figure.add_subplot(111)
ax.plot(x,y)

figure.show()  # figure is shown in GUI

# How can I view the figure again after I closed the GUI window?

figure.show()  # Exception in Tkinter callback... TclError: this isn't a Tk application
figure.show()  # nothing happened
Run Code Online (Sandbox Code Playgroud)

所以我的问题是:

  1. 如果调用了Figure.show(),如何获取上一个图?

  2. figure.add_suplot(111)如果我有多个数字,因此from pylab import *; plot(..); show()似乎不是我正在寻找的解决方案,是否有更方便的替代方法。

我渴望的是

showfunc(stuff) # or
stuff.showfunc()
Run Code Online (Sandbox Code Playgroud)

其中stuff是一个对象,其中包含布置在一张图片中的所有图,并且showfunc是无状态的(我是说,每次调用它时,我的行为就像第一次调用一样)。与之合作时可能matplotlib吗?

Fro*_*ame 4

我找不到满意的答案,因此我通过编写一个自定义Figure类扩展matplotlib.figure.Figure并提供一个新show()方法来处理这个问题,该方法gtk.Window每次调用时都会创建一个对象。

import gtk
import sys
import os
import threading

from matplotlib.figure import Figure as MPLFigure
from matplotlib.backends.backend_gtkagg import FigureCanvasGTKAgg as FigureCanvas
from matplotlib.backends.backend_gtkagg import NavigationToolbar2GTKAgg as NaviToolbar


class ThreadFigure(threading.Thread):
    def __init__(self, figure, count):
        threading.Thread.__init__(self)
        self.figure =   figure
        self.count  =   count
    def run(self):
        window  =   gtk.Window()
        # window.connect('destroy', gtk.main_quit)

        window.set_default_size(640, 480)
        window.set_icon_from_file(...)  # provide an icon if you care about the looks

        window.set_title('MPL Figure #{}'.format(self.count))
        window.set_wmclass('MPL Figure', 'MPL Figure')

        vbox    =   gtk.VBox()
        window.add(vbox)

        canvas  =   FigureCanvas(self.figure)
        vbox.pack_start(canvas)

        toolbar =   NaviToolbar(canvas, window)
        vbox.pack_start(toolbar, expand = False, fill = False)

        window.show_all()
        # gtk.main() ... should not be called, otherwise BLOCKING


class Figure(MPLFigure):
    display_count = 0
    def show(self):
        Figure.display_count += 1 
        thrfig = ThreadFigure(self, Figure.display_count)
        thrfig.start()
Run Code Online (Sandbox Code Playgroud)

使该文件作为IPython. 和

figure = Figure()
ax = figure.add_subplot(211)
... (same story as using standard `matplotlib.pyplot` )
figure.show()

# window closed accidentally or intentionally...

figure.show()
# as if `.show()` is never called
Run Code Online (Sandbox Code Playgroud)

作品!我从来没有接触过GUI编程,也不知道这是否会有任何副作用。如果您认为应该这样做,请自由发表评论。