我有 matplotlib 不清除内存的问题（我假设）。我试过在谷歌上四处张望，但无济于事。我希望每次关闭 matplotlib 图形（由“PLOT”按钮调用）后清除内存。提前致谢。
################
#IMPORT MODULES#
################
from Tkinter import *
import matplotlib.pyplot as plt
#####
#GUI#
#####
class Application(Frame):
#read entry values and estimate the plot(s)
def run_brussel(self):
#read entry values
t_start = float(self.t_start_entry.get())
t_end = float(self.t_end_entry.get())
t_diff = float(self.t_diff_entry.get())
k1 = float(self.k1_entry.get())
k2 = float(self.k2_entry.get())
k3 = float(self.k3_entry.get())
k4 = float(self.k4_entry.get())
A = float(self.A_entry.get())
B = float(self.B_entry.get())
X = float(self.X_entry.get())
Y = float(self.Y_entry.get())
mode = self.mode.get()
#estimate the values of the Brusselator X and Y functions
brussel = brussel_func(t_start, t_end, t_diff, k1, k2, k3, k4, A, B, X, Y)
t_list = brussel[0]
X_list = brussel[1]
Y_list = brussel[2]
#plot the functions
plot_brussel(mode, t_list, X_list, Y_list)
#define labels, entries, radio buttons and buttons
def createWidgets(self):
self.t_start_label = Label(self, text="Start time:")
self.t_start_label.grid(row=0, column=0, sticky=W)
self.t_start_entry = Entry(self)
self.t_start_entry.delete(0, END)
self.t_start_entry.insert(0, "0.0")
self.t_start_entry.grid(row=0, column=1)
self.t_end_label = Label(self, text="End time:")
self.t_end_label.grid(row=1, column=0, sticky=W)
self.t_end_entry = Entry(self)
self.t_end_entry.delete(0, END)
self.t_end_entry.insert(0, "100.0")
self.t_end_entry.grid(row=1, column=1)
self.t_diff_label = Label(self, text="Time precision:")
self.t_diff_label.grid(row=2, column=0, sticky=W)
self.t_diff_entry = Entry(self)
self.t_diff_entry.delete(0, END)
self.t_diff_entry.insert(0, "0.0001")
self.t_diff_entry.grid(row=2, column=1)
self.k1_label = Label(self, text="Constant k1 value:")
self.k1_label.grid(row=3, column=0, sticky=W)
self.k1_entry = Entry(self)
self.k1_entry.delete(0, END)
self.k1_entry.insert(0, "1.0")
self.k1_entry.grid(row=3, column=1)
self.k2_label = Label(self, text="Constant k2 value:")
self.k2_label.grid(row=4, column=0, sticky=W)
self.k2_entry = Entry(self)
self.k2_entry.delete(0, END)
self.k2_entry.insert(0, "1.0")
self.k2_entry.grid(row=4, column=1)
self.k3_label = Label(self, text="Constant k3 value:")
self.k3_label.grid(row=5, column=0, sticky=W)
self.k3_entry = Entry(self)
self.k3_entry.delete(0, END)
self.k3_entry.insert(0, "1.0")
self.k3_entry.grid(row=5, column=1)
self.k4_label = Label(self, text="Constant k4 value:")
self.k4_label.grid(row=6, column=0, sticky=W)
self.k4_entry = Entry(self)
self.k4_entry.delete(0, END)
self.k4_entry.insert(0, "1.0")
self.k4_entry.grid(row=6, column=1)
self.A_label = Label(self, text="Initial A concentration:")
self.A_label.grid(row=7, column=0, sticky=W)
self.A_entry = Entry(self)
self.A_entry.delete(0, END)
self.A_entry.insert(0, "1.0")
self.A_entry.grid(row=7, column=1)
self.B_label = Label(self, text="Initial B concentration:")
self.B_label.grid(row=8, column=0, sticky=W)
self.B_entry = Entry(self)
self.B_entry.delete(0, END)
self.B_entry.insert(0, "2.5")
self.B_entry.grid(row=8, column=1)
self.X_label = Label(self, text="Initial X concentration:")
self.X_label.grid(row=9, column=0, sticky=W)
self.X_entry = Entry(self)
self.X_entry.delete(0, END)
self.X_entry.insert(0, "0.0")
self.X_entry.grid(row=9, column=1)
self.Y_label = Label(self, text="Initial Y concentration:")
self.Y_label.grid(row=10, column=0, sticky=W)
self.Y_entry = Entry(self)
self.Y_entry.delete(0, END)
self.Y_entry.insert(0, "0.0")
self.Y_entry.grid(row=10, column=1)
self.mode = IntVar()
self.modus_operandi_label = Label(self, text="Plot type:")
self.modus_operandi_label.grid(row=11, column=0, sticky=W)
self.modus_operandi_button1 = Radiobutton(self, text="X : Y", variable=self.mode, value=True).grid(row=11, column=1, sticky=W)
self.modus_operandi_button2 = Radiobutton(self, text="X, Y : time", variable=self.mode, value=False).grid(row=12, column=1, sticky=W)
self.plot = Button(self)
self.plot["text"] = "PLOT",
self.plot["command"] = self.run_brussel
self.plot.grid(row=13, column=0, columnspan=2, sticky=N+S+W+E)
self.QUIT = Button(self)
self.QUIT["text"] = "QUIT"
self.QUIT["fg"] = "red"
self.QUIT["command"] = self.quit_pressed
self.QUIT.grid(row=14, column=0, columnspan=2, sticky=N+S+W+E)
#invoke the window
def __init__(self, master=None):
Frame.__init__(self, master)
self.grid()
self.createWidgets()
#destroy the window
def quit_pressed(self):
quit()
######################
#FUNCTION DEFINITIONS#
######################
#Brusselator X and Y values estimation
def brussel_func(t_start, t_end, t_diff, k1, k2, k3, k4, A, B, X, Y):
t = t_start
t_list = []
t_list.append(0)
X_list = [X]
Y_list = [Y]
step = 0
while t < t_end:
X_diff = t_diff * (k1 * A - k2 * B * X_list[step] + k3 * X_list[step]**2 * Y_list[step] - k4 * X_list[step])
Y_diff = t_diff * (k2 * B * X_list[step] - k3 * X_list[step]**2 * Y_list[step])
X_list.append(X)
Y_list.append(Y)
t_list.append(t)
t += t_diff
X += X_diff
Y += Y_diff
step += 1
return [t_list, X_list, Y_list]
#plot
def plot_brussel(mode, t_list, X_list, Y_list):
p = []
#plots X : Y
if mode == True:
p = plt.plot(X_list, Y_list)
plt.xlabel('x')
plt.ylabel('y')
#plots X, Y : time
else:
p = plt.plot(t_list, X_list, label="X")
p += plt.plot(t_list, Y_list, label="Y")
plt.legend(loc="upper left", bbox_to_anchor=(1,1))
plt.xlabel('time')
#displays chosen plot
plt.show(p)
plt.clf(p)
plt.close(p)
def main():
root = Tk()
root.wm_title("Brusselator")
app = Application(master=root)
app.mainloop()
#############
#SCRIPT BODY#
#############
if __name__ == '__main__':
main()