I am writing some mass spec data reduction software in Python v3.7.9, and using matplotlib v3.5.3 to display the data.

I recently discovered that I have been using the wrong module, matplotlib.pyplot, which isn’t compatible with tkinter. I am now trying to switch to using matplotlib.figure, which is compatible (reference).

This has caused a couple of problems:

• The layout is now far tighter, causing near overlapping axes and a ton of whitespace around the plots.
• I cannot add a suptitle (AttributeError: module 'matplotlib.figure' has no attribute 'suptitle'), even though the attribute is clearly defined in the matplotlib docs.

Here are some before and after screenshots: the first is using matplotlib.pyplot with a tight layout, and the second is using matplotlib.figure with the default layout option.

Manually setting the layout as either ‘tight’ or ‘constrained’ doesn’t seem to have much effect at all, nor does leaving the layout style undefined.

Is there a way to restore the previous “expanded” layout style without manually defining a ton of parameters?

Here is an example script to work with:

import customtkinter as ctk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

import matplotlib.figure as Figure

# create the window using CTK
window = ctk.CTk()

# create the plot of random data
figure = Figure.Figure(figsize=(15,9))
Figure.layout = 'tight'

# create the subplots
ax1 = figure.add_subplot(2, 3, 1)
ax2 = figure.add_subplot(2, 3, 2)
ax3 = figure.add_subplot(2, 3, 3)
ax4 = figure.add_subplot(2, 3, 4)
ax5 = figure.add_subplot(2, 3, 5)
ax6 = figure.add_subplot(2, 3, 6)

# plot data in each subplot
data = [1, 2, 3, 4, 5]
ax1.plot(data)
ax2.plot(data)
ax3.plot(data)
ax4.plot(data)
ax5.plot(data)
ax6.plot(data)

# add titles to each subplot
ax1.set_title('Subplot 1')
ax2.set_title('Subplot 2')
ax3.set_title('Subplot 3')
ax4.set_title('Subplot 4')
ax5.set_title('Subplot 5')
ax6.set_title('Subplot 6')

# Add the plot to the window
canvas = FigureCanvasTkAgg(figure, master=window)
canvas.draw()
canvas.get_tk_widget().pack(side='top', fill='both', expand=True)

exit_button = ctk.CTkButton(window, text='Exit', command=window.destroy)
exit_button.pack(side='bottom')  # add the exit button to the window

window.mainloop()

Lastly, as I mentioned above, the matplotlib docs clearly show a .suptitle() attribute, however, adding Figure.suptitle('Data') results in AttributeError: module 'matplotlib.figure' has no attribute 'suptitle'. What am I doing wrong?

Thank you in advance!