如何在Python中结合Cmd和Matplotlib

发布于 2024-09-13 23:40:25 字数 700 浏览 12 评论 0原文

我想将 Matplotlib 中的交互式绘图与 python 中的命令行界面 Cmd 结合起来。我该怎么做？我可以使用线程吗？我尝试了以下操作：

from cmd import Cmd
import matplotlib.pylab as plt
from threading import Thread

class MyCmd(Cmd):

    def __init__(self):
        Cmd.__init__(self)
        self.fig = plt.figure()
        self.ax = self.fig.add_subplot(1,1,1)

    def do_foo(self, arg):
        self.ax.plot(range(10))
        self.fig.canvas.draw()

if __name__=='__main__':
    c = MyCmd()
    Thread(target=c.cmdloop).start()
    plt.show()

它打开一个图形窗口，我可以在控制台中键入实际执行的命令。当执行“foo”命令时，它会在图形窗口中绘制。到目前为止一切都还好。然而，当我重新进入控制台时，控制台似乎被卡住了，现在出现了新的命令窗口。但是，当我单击图形窗口时，控制台会输出一个新的命令提示符，我可以输入一个新命令。看来这两个循环并没有真正交错或什么的。有没有更好、更通用的方法？

原文

I'd like to combine interactive plotting in Matplotlib and the Command line interface Cmd in python. How can I do this?
Can I use threading? I tried the following:

from cmd import Cmd
import matplotlib.pylab as plt
from threading import Thread

class MyCmd(Cmd):

    def __init__(self):
        Cmd.__init__(self)
        self.fig = plt.figure()
        self.ax = self.fig.add_subplot(1,1,1)

    def do_foo(self, arg):
        self.ax.plot(range(10))
        self.fig.canvas.draw()

if __name__=='__main__':
    c = MyCmd()
    Thread(target=c.cmdloop).start()
    plt.show()

It opens a figure window and I can type commands in the console that are actually executed. When the "foo" command is executed it draws in the figure window. So far everything is ok. When I reenter the console, however, the console seems to be stuck and there is now new command window. But when I click into the figure window the console outputs a new command prompt and I can enter a new command.
It seems the two loops are not really interleaved or something. Is there a better, more common way?

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青春有你 2024-09-20 23:40:25

我发现了一些有用的东西，但相当丑陋

from cmd import Cmd
import matplotlib.pylab as plt
from threading import Thread
import time

class MyCmd(Cmd):

    def __init__(self):
        Cmd.__init__(self)
        self.fig = plt.figure()
        self.ax = self.fig.add_subplot(1,1,1)

    def do_foo(self, arg):
        self.ax.plot(range(10))
        self.fig.canvas.draw()

if __name__=='__main__':
    plt.ion()
    c = MyCmd()
    def loop():
        while True:
            c.fig.canvas.draw()
            time.sleep(0.1)
    Thread(target=loop).start()
    c.cmdloop()

这只是定期调用图形的绘制方法。如果我不这样做，当图形被遮挡并再次来到前面时，就不会重新绘制图形。

但这看起来很难看。有更好的办法吗？

I found something that works, but is rather ugly

from cmd import Cmd
import matplotlib.pylab as plt
from threading import Thread
import time

class MyCmd(Cmd):

    def __init__(self):
        Cmd.__init__(self)
        self.fig = plt.figure()
        self.ax = self.fig.add_subplot(1,1,1)

    def do_foo(self, arg):
        self.ax.plot(range(10))
        self.fig.canvas.draw()

if __name__=='__main__':
    plt.ion()
    c = MyCmd()
    def loop():
        while True:
            c.fig.canvas.draw()
            time.sleep(0.1)
    Thread(target=loop).start()
    c.cmdloop()

This simply calls the draw method of the figure periodically. If I don't do this, the figure is not redrawn, when it was occluded and comes to the front again.

But this seems ugly. Is there a better way?

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