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When I run a file that uses matplolib animation, I keep getting this error. Using OS X, Python 2.7, installed Python from python.org then used homebrew. Matplotlib install from pip. #6348
Description
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the information below.
- Matplotlib version, Python version and Platform (Windows, OSX, Linux ...)
- How did you install Matplotlib and Python (pip, anaconda, from source ...)
- If possible please supply a Short, Self Contained, Correct, Example
that demonstrates the issue i.e a small piece of code which reproduces the issue
and can be run with out any other (or as few as possible) external dependencies. - If this is an image generation bug attach a screenshot demonstrating the issue.
- If this is a regression (Used to work in an earlier version of Matplotlib), please
note where it used to work.
Error:
Traceback (most recent call last):
File "HOstates.py", line 20, in <module>
import matplotlib.animation as animation
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py", line 365, in <module>
class FFMpegWriter(MovieWriter, FFMpegBase):
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py", line 49, in wrapper
if writerClass.isAvailable():
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py", line 239, in isAvailable
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
errread, errwrite)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1334, in _execute_child
child_exception = pickle.loads(data)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 1388, in loads
return Unpickler(file).load()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 864, in load
dispatch[key](self)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 972, in load_string
raise ValueError, "insecure string pickle"
ValueError: insecure string pickleReacted by hipppo
Activity
[-]When I run a file that uses matplolib animation, I keep getting this error:[/-][+]When I run a file that uses matplolib animation, I keep getting this error. Using OS X, Python 2.7, installed Python from python.org then used homebrew. Matplotlib install from pip. [/+]tacaswell commentedon Apr 29, 2016
Also see
#5386
#5314
Can you please provide a minimal example which causes thes error?
tacaswell commentedon Apr 29, 2016
It also looks like this is a python2 only bug, if you can switch to python3
TariniHardikar commentedon Apr 29, 2016
import numpy as np
import matplotlib ##To get blit working
matplotlib.use('TkAgg') ##
from matplotlib import pyplot as pl
from matplotlib import animation
I'm not sure why, but there is some error with matplotlib animation. Everything else works fine. Is it a version issue?
QuLogic commentedon Oct 22, 2016
This is a dupe of the two bugs @tacaswell noted above.
2.0 will require
subprocess32to work around this bug (see #6576.)