New submission from Amir Emami <amirali1...@gmail.com>:
TkInter variable classes don't link to a widget (tested on Checkbutton and
Scale) if matplotlib.pyplot.set_cmap() function is called before the
tkinter.Tk() call which instantiates the root of a TkInter GUI. There is no
problem if it is called after this, though.
Simple example with checkbox attached below:
### Test program start ##############
import matplotlib.pyplot as plt
import tkinter as tk
plt.set_cmap('viridis') # <--- when placed here, breaks the variable
root = tk.Tk()
#plt.set_cmap('viridis') # <--- when placed here, everything is fine
# creation of variable class and widget
var = tk.BooleanVar()
tk.Checkbutton(root, variable=var).pack()
# for printing result
def on_click():
print(var.get())
tk.Button(root, text="Print State to Console", command=on_click).pack()
root.mainloop()
----------
components: Tkinter
files: tk and plt conflict.py
messages: 353359
nosy: amiraliemami
priority: normal
severity: normal
status: open
title: tkinter variable classes don't link to widget if matplotlib's set_cmap()
function is called before the tkinter GUI is instantiated
type: behavior
versions: Python 3.6
Added file: https://bugs.python.org/file48627/tk and plt conflict.py
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38292>
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