import PySimpleGUI as sg
import matplotlib
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

fig = plt.figure(figsize=(5, 4), dpi=100)

Darren Jones RP Team on Dec. 22, 2022

@Michel - Can you post the code that did work and the code that didn’t?

Michel on Dec. 24, 2022

Hi Darren

Sorry for the late reply, below the code that didn’t work and the error message. (the code that did the trick is commented out)

# psg_matplotlib.py

import PySimpleGUI as sg
import matplotlib
# import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)
# fig = plt.figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot(111).plot(t, 2 * np.sin(2 * np.pi * t))

matplotlib.use('TkAgg')

def draw_figure(canvas, figure):
    figure_canvas_agg = FigureCanvasTkAgg(figure, canvas)
    figure_canvas_agg.draw()
    figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1)
    return figure_canvas_agg

# define the window layout
layout = [
    [sg.Text('Plot test')],
    [sg.Canvas(key='-CANVAS-')],
    [sg.Button('Ok')],
    ]

# create the form and show it without the plot
window = sg.Window(
    'Matplotlib Single Graph',
    layout,
    location=(0 ,0),
    finalize=True,
    element_justification='center',
    font='Helvetica 18',
)

# add the plot to the window
draw_figure(window['-CANVAS-'].TKCanvas, fig)

event, values = window.read()

window.close()

Error message:

line 224, in __getattr__
    raise AttributeError(AttributeError: module 'matplotlib' has no attribute 'figure'

Also found this in init.py

"""
For the most part, direct use of the explicit object-oriented library is
encouraged when programming; the implicit pyplot interface is primarily for
working interactively. The exceptions to this suggestion are the pyplot
functions `.pyplot.figure`, `.pyplot.subplot`, `.pyplot.subplots`, and
`.pyplot.savefig`, which can greatly simplify scripting.  See
:ref:`api_interfaces` for an explanation of the tradeoffs between the implicit
and explicit interfaces.
"""

Darren Jones RP Team on Dec. 29, 2022

Hi Michel. On the face of it you may think that you could change the line

fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)

fig = matplotlib.pyplot.figure.Figure(figsize=(5, 4), dpi=100)

to make it work, but pyplot doesn’t work in that way - it doesn’t work in the way that many modules do where you can import a sub-module and get all the functionality, or import the whole module and drill down using . notation.

If you look at the source code of matplotlib on github - github.com/matplotlib/matplotlib - in the lib folder, you’ll see that pyplot isn’t a folder with other folders in it and with an __init__.py, so you need to import it directly (typically aliased as plt) and then make use of it from there as plt.figure, etc.

If you have a look at the code of pyplot - github.com/matplotlib/matplotlib/blob/main/lib/matplotlib/pyplot.py - you can see that there are a lot of imports at the top of the file (which means the code in this file is run, so all the imports are executed), and that’s why you need to import pyplot in this manner (so that the file is executed and the imports happen).

If you try to access Figure directly, while matplotlib.figure does exist (and it’s in the files in the github repo), matplotlib.figure.Figure doesn’t exist, because it’s not imported as part of the matplotlib __init__.py import process.

However, if you want to, you can have the following imports (which import matplotlib but also Figure directly):

import matplotlib from matplotlib.figure import Figure

and then change the fig creation line to

fig = Figure(figsize=(5, 4), dpi=100)

and that will work… but it’s a convoluted way to access Figure(), so I’d stick to importing pyplot in the recommended method!

toigopaul on Jan. 20, 2024

Darren,

I’m really looking forward to including graphs on my tkinter windows. Thanks!

However, similar to @Michel, I get hung up with an

AttributeError: module ‘matplotlib’ has no attribute ‘figure’

unless I add:

from matplotlib.figure import Figure

Darren Jones RP Team on Jan. 23, 2024

Hi toigopaul! It sounds like you have similar issues to Michel - can you post the code that isn’t working (unless you add the stated import)? It sounds like a pretty similar situation to his.

toigopaul on Jan. 23, 2024

# GUI_psg_matplotlib

import numpy as np
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import PySimpleGUI as sg
import matplotlib

fig = matplotlib.figure.Figure(figsize=(5, 4), dpi=100)
t = np.arange(0, 3, .01)
fig.add_subplot(111).plot(t,2*np.sin(2*np.pi*t))

matplotlib.use("TkAgg")

def draw_figure(canvas, figure):
    figure_canvas_agg=FigureCanvasTkAgg(figure,canvas)
    figure_canvas_agg.draw()
    figure_canvas_agg.get_tk_widget().pack(
        side="top",fill="both",expand=1
    )
    return figure_canvas_agg

# define window layout
layout = [
    [sg.Text("Plot test")],
    [sg.Canvas(key="-CANVAS-")],
    [sg.Button("Ok")]
]

# create form and show without plot
window = sg.Window(
    "Matplotlib single graph",
    layout,
    location=(0,0),
    finalize=True,
    element_justification="center",
    font="Helvetica 18"
)

# add the plot to the window
draw_figure(window["-CANVAS-"].TKCanvas, fig)

event, values = window.read()

window.close()

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