Spyder opening/closing matplotlib window problem

[ChrisBail]

Description of your problem

What steps will reproduce the problem?

I'm using the python library obspy. They have a class method to plot signal, which is class_name.plot(). When running it under Spyder, the window pops up really quickly then disappears. When running it in "inline" mode there is no problem of display. Moreover when in "automatic" mode (tools>preferences>python) when running a classical matplotlib.pyplot.show() it has no problem of showing the figure in a new window

What is the expected output? What do you see instead?

class_name.plot() should give an interactive plot

Please provide any additional information below

Versions and main components

• Spyder Version:3.1.3
• Python Version:2.7.12
• Qt Version:4.8.7
• PyQt Version:4.11.4
• Operating system: xubuntu 16.04

Dependencies

Please go to the menu entry Help > Optional Dependencies (or
Help > Dependencies), press the button Copy to clipboard
and paste the contents below:

jedi =0.9.0 : 0.9.0 (OK)
matplotlib >=1.0 : 1.5.3 (OK)
nbconvert >=4.0 : 5.1.1 (OK)
numpy >=1.7 : 1.12.0 (OK)
pandas >=0.13.1 : None (NOK)
pep8 >=0.6 : 1.7.0 (OK)
psutil >=0.3 : 5.1.3 (OK)
pyflakes >=0.5.0 : 1.5.0 (OK)
pygments >=2.0 : 2.2.0 (OK)
pylint >=0.25 : 1.6.4 (OK)
qtconsole >=4.2.0: 4.2.1 (OK)
rope >=0.9.4 : 0.9.4 (OK)
sphinx >=0.6.6 : 1.5.2 (OK)
sympy >=0.7.3 : None (NOK)

[ccordoba12]

This is (probably) a duplicate of issue #4002. What happens if you run twice (before plotting for the first time with the inline backend)

%matplotlib qt5

?

[ChrisBail]

running %matplotlib qt5 I get:
Warning: Cannot change to a different GUI toolkit: qt5. Using qt instead.

[ccordoba12]

Sorry, I didn't see you're using Qt4. Then what happens if you run twice

%matplotlib qt

?

[ChrisBail]

Still the same, the windows pops up quickly then shuts down.

[ccordoba12]

Please post a complete and simple code that generates this problem, so we can test and debug it in our side.

[ChrisBail]

#!/usr/bin/env python2

from obspy import read
st=read()
st.plot()

[ccordoba12]

What does read do?

[ChrisBail]

read reads a signal from a URL, for example:

st = read('http://examples.obspy.org/RJOB_061005_072159.ehz.new')
print(st)
1 Trace(s) in Stream:
.RJOB..Z | 2005-10-06T07:21:59.849998Z - 2005-10-06T07:24:59.844998Z | 200.0 Hz, 36000 samples

Without any argument it will just read and plot some inside example

[ccordoba12]

This was fixed in 3.1.4, please update.

[gisofer]

Hi, I am having the same problem.
Is there a way to fix it?

Spyder Version: 3.2.3
Python Version: 2.7.13 64 bits
Qt Version: 5.6.2
PyQt5 Version: 5.6
Operating system: Windows 10 Pro

IPython >=4.0;<6.0: 5.4.1 (OK)
cython >=0.21 : 0.26.1 (OK)
jedi >=0.9.0 : 0.10.2 (OK)
nbconvert >=4.0 : 5.3.1 (OK)
numpy >=1.7 : 1.11.3 (OK)
pandas >=0.13.1 : 0.20.3 (OK)
pycodestyle >=2.3 : 2.3.1 (OK)
pyflakes >=0.5.0 : 1.5.0 (OK)
pygments >=2.0 : 2.2.0 (OK)
pylint >=0.25 : 1.7.2 (OK)
qtconsole >=4.2.0 : 4.3.1 (OK)
rope >=0.9.4 : 0.10.5 (OK)
sphinx >=0.6.6 : 1.6.3 (OK)
sympy >=0.7.3 : 1.1.1 (OK)