from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import matplotlib.patches as patches
# from Tkinter import Tk, Canvas, Frame, Label, Button
from six.moves import tkinter as Tk
import gc
import resource
from matplotlib.figure import Figure
import sys
list_fig_g = []
list_wid_g = []
def launcher(list_wid, list_fig, frame):
print('Memory usage: %s (kb)'
% resource.getrusage(resource.RUSAGE_SELF).ru_maxrss,)
for f in list_fig:
f.clf()
f.clear()
f._master = None
del f
list_fig.clear()
for i in list_wid:
print(i, sys.getrefcount(i))
r = i.winfo_toplevel()
i.grid_forget()
i.destroy()
for k in ('<MouseWheel>', '<Destroy>'):
r.unbind(k)
print(i, sys.getrefcount(i))
del i
list_wid.clear()
fig1 = Figure(figsize=(1, 1))
ax1 = fig1.add_subplot(111, aspect='equal')
ax1.add_patch(
patches.Arrow(
0, # x
-0, # y
1, # dx
0, # dy
width=1,
)
)
list_fig.append(fig1)
# this seems to be the first line that leaks memory
# but not _always_
canvas = FigureCanvasTkAgg(fig1, master=None)
t1, t2, w, h = fig1.bbox.bounds
widget = canvas.get_tk_widget()
# widget = Tk.Canvas(
# master=frame, width=w, height=h, borderwidth=0,
# highlightthickness=0)
# w2 = Tk.PhotoImage(
# master=widget, width=int(w), height=int(h))
# widget.create_image(w//2, h//2, image=w2)
widget.grid(row=0, column=1)
widget.focus_set()
list_wid.extend(frame.winfo_children())
# print(w)
# print('gc: ', gc.collect(2))
gc.collect(2)
# canvas.draw()
print('Memory usage: %s (kb)'
% resource.getrusage(resource.RUSAGE_SELF).ru_maxrss)
print()
def bulk(list_wid, list_fig, frame):
for j in range(100):
launcher(list_wid, list_fig, frame)
root = Tk.Tk()
Entete5 = Tk.Label(root, width=20, height=1).grid(row=0, column=1)
fond = Tk.Canvas(root, width=800, height=200)
fond.grid(row=1, column=1)
frame_g = Tk.Frame(fond, width=80, height=10)
frame_g.grid(row=0, column=1)
fond.create_window(0, 0, window=frame_g)
Load = Tk.Button(root, text="Load",
command=lambda: launcher(list_wid_g, list_fig_g, frame_g))
go = Tk.Button(root, text="bulk",
command=lambda: bulk(list_wid_g, list_fig_g, frame_g))
Load.grid(row=7, column=4)
go.grid(row=6, column=4)
list_wid = frame_g.winfo_children()
root.mainloop()
(I also added a 'bulk' button to run 100 iterations). I tried just creating a FigureCanvasAgg object (the super-class of FigureCanvasTkAgg) and that seems not to leak. Doing most of the tk work that FigureCanvasTkAgg does not seem to leak.
It looks like it is the callbacks that are registered to handle mouse and key board events, deleteing them from the __init__ seems to prevent the leak!
Not sure what the right way to clean those up is though, but at least this is pointing the right direction!
Locked
