interfaz - tkinter python 2.7 example

importa el gráfico matplotlib en una interfaz gráfica de usuario de tkinter. Error en show()

Question

Intento incrustar un gráfico matplotlib en mi interfaz gráfica de usuario de tkinter. Después de muchos intentos de probar ejemplos publicados en el sitio matplotlib, ninguno de ellos parece funcionar.

Por ejemplo:

#!/usr/bin/env python

import matplotlib
matplotlib.use(''TkAgg'')

from numpy import arange, sin, pi
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
# implement the default mpl key bindings
from matplotlib.backend_bases import key_press_handler


from matplotlib.figure import Figure

import sys
if sys.version_info[0] < 3:
    import Tkinter as Tk
else:
    import tkinter as Tk

root = Tk.Tk()
root.wm_title("Embedding in TK")


f = Figure(figsize=(5, 4), dpi=100)
a = f.add_subplot(111)
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)

a.plot(t, s)


# a tk.DrawingArea
canvas = FigureCanvasTkAgg(f, master=root)
canvas.show()
canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)

toolbar = NavigationToolbar2TkAgg(canvas, root)
toolbar.update()
canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)


def on_key_event(event):
    print(''you pressed %s'' % event.key)
    key_press_handler(event, canvas, toolbar)

canvas.mpl_connect(''key_press_event'', on_key_event)


def _quit():
    root.quit()     # stops mainloop
    root.destroy()  # this is necessary on Windows to prevent
                    # Fatal Python Error: PyEval_RestoreThread: NULL tstate

button = Tk.Button(master=root, text=''Quit'', command=_quit)
button.pack(side=Tk.BOTTOM)

Tk.mainloop()
# If you put root.destroy() here, it will cause an error if
# the window is closed with the window manager. 

El ejemplo anterior me da este error:

Traceback (most recent call last):
  File "<tmp 1>", line 34, in <module>
    canvas.show()
  File "C:/pyzo2015a/lib/site-packages/matplotlib/backends/backend_tkagg.py", line 350, in draw
    tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
  File "C:/pyzo2015a/lib/site-packages/matplotlib/backends/tkagg.py", line 24, in blit
    tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode, id(bbox_array))
_tkinter.TclError

Otro ejemplo:

#!/usr/bin/env python
# -*- noplot -*-

import matplotlib as mpl
import numpy as np
import sys
if sys.version_info[0] < 3:
    import Tkinter as tk
else:
    import tkinter as tk
import matplotlib.backends.tkagg as tkagg
from matplotlib.backends.backend_agg import FigureCanvasAgg


def draw_figure(canvas, figure, loc=(0, 0)):
    """ Draw a matplotlib figure onto a Tk canvas

    loc: location of top-left corner of figure on canvas in pixels.

    Inspired by matplotlib source: lib/matplotlib/backends/backend_tkagg.py
    """
    figure_canvas_agg = FigureCanvasAgg(figure)
    figure_canvas_agg.draw()
    figure_x, figure_y, figure_w, figure_h = figure.bbox.bounds
    figure_w, figure_h = int(figure_w), int(figure_h)
    photo = tk.PhotoImage(master=canvas, width=figure_w, height=figure_h)

    # Position: convert from top-left anchor to center anchor
    canvas.create_image(loc[0] + figure_w/2, loc[1] + figure_h/2, image=photo)

    # Unfortunatly, there''s no accessor for the pointer to the native renderer
    tkagg.blit(photo, figure_canvas_agg.get_renderer()._renderer, colormode=2)

    # Return a handle which contains a reference to the photo object
    # which must be kept live or else the picture disappears
    return photo

# Create a canvas
w, h = 300, 200
window = tk.Tk()
window.title("A figure in a canvas")
canvas = tk.Canvas(window, width=w, height=h)
canvas.pack()

# Generate some example data
X = np.linspace(0, 2.0*3.14, 50)
Y = np.sin(X)

# Create the figure we desire to add to an existing canvas
fig = mpl.figure.Figure(figsize=(2, 1))
ax = fig.add_axes([0, 0, 1, 1])
ax.plot(X, Y)

# Keep this handle alive, or else figure will disappear
fig_x, fig_y = 100, 100
fig_photo = draw_figure(canvas, fig, loc=(fig_x, fig_y))
fig_w, fig_h = fig_photo.width(), fig_photo.height()

# Add more elements to the canvas, potentially on top of the figure
canvas.create_line(200, 50, fig_x + fig_w / 2, fig_y + fig_h / 2)
canvas.create_text(200, 50, text="Zero-crossing", anchor="s")

# Let Tk take over
tk.mainloop()

Este me da este error:

 Traceback (most recent call last):
      File "<tmp 2>", line 56, in <module>
        fig_photo = draw_figure(canvas, fig, loc=(fig_x, fig_y))
      File "<tmp 2>", line 32, in draw_figure
        tkagg.blit(photo, figure_canvas_agg.get_renderer()._renderer, colormode=2)
      File "C:/pyzo2015a/lib/site-packages/matplotlib/backends/tkagg.py", line 24, in blit
        tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode, id(bbox_array))
    _tkinter.TclError

No entiendo por qué estos ejemplos no funcionan. ¿Puede alguien ayudarme?

Answer 1

Tuve un problema similar, así que esto funcionó para mí. Si está usando Windows, sugiero desinstalar la pillow y matplotlib y reinstalar desde aquí