Closed
Description
Bug report
Bug summary
The bug revolves around the interaction between tkinter and matplotlib, while using PdfPages. Specifically, somehow a call to pyplot.close() let's the current 'module' finish but afterwards the tk.Tk() instance is closed without warning/error (see the attached MVE code). I expect that this is a bug in the matplotlib domain after hearing that this occurs more often (https://stackoverflow.com/q/54772180/1093485).
Code for reproduction
import tkinter as tk
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages
from pathlib import Path
class Pdf(object):
def __init__(self, master):
self.master = master
pdf = PdfPages(Path.cwd() / 'demo.pdf')
self.pdf = pdf
def plot_initial(self):
fig = plt.figure(figsize=(8,6))
fig.add_subplot(111)
mu, sigma = 0, 0.1
s = np.random.normal(mu, sigma, 1000)
count, bins, ignored = plt.hist(s, 30, density=True)
plt.plot(bins, 1/(sigma * np.sqrt(2 * np.pi)) *
np.exp( - (bins - mu)**2 / (2 * sigma**2) ),
linewidth=2, color='r')
plt.title('Overview')
plt.xlabel('X')
plt.ylabel('Y')
self.pdf.savefig(fig)
# THE CULPRIT
plt.close(fig)
def plot_extra(self):
fig = plt.figure(figsize=(8,6))
fig.add_subplot(111)
mu, sigma = 0, 0.1
s = np.random.normal(mu, sigma, 1000)
count, bins, ignored = plt.hist(s, 30, density=True)
plt.plot(bins, 1/(sigma * np.sqrt(2 * np.pi)) *
np.exp( - (bins - mu)**2 / (2 * sigma**2) ),
linewidth=2, color='r')
plt.title('Extra')
plt.xlabel('X')
plt.ylabel('Y')
self.pdf.savefig(fig)
plt.close(fig)
def close(self):
self.pdf.close()
class MVE(object):
@classmethod
def run(cls):
root = tk.Tk()
MVE(root)
root.mainloop()
def __init__(self, master):
self.root = master
tk.Frame(master)
menu = tk.Menu(master)
master.config(menu=menu)
test_menu = tk.Menu(menu, tearoff=0)
menu.add_cascade(label='Bug', menu=test_menu)
test_menu.add_command(label='PDF', command=
self.generate_pdf)
def generate_pdf(self):
pdf = Pdf(self)
pdf.plot_initial()
for i in range(0,3):
pdf.plot_extra()
pdf.close()
if __name__ == "__main__":
MVE.run()Expected outcome
I expect that the initial tk.Tk() 54D5 window isn't closed once the PDF report has been generated.
Matplotlib version
- Operating system: Tested on Win 7 and Win 10
- Matplotlib version: 2.2.3 from pip
- Matplotlib backend (
print(matplotlib.get_backend())): TkAgg - Python version: 3.7.0
- Jupyter version (if applicable):
- Other libraries: Tkinter 8.6 from pip