Python 2 import error: cannot import name unpack_labeled_data

Question

I m trying to import import numpy as np. This is my code

import cv2
from matplotlib import pyplot as plt

img = cv2.imread('messi5.jpg',0)
plt.imshow(img, cmap = 'gray', interpolation = 'bicubic')
plt.xticks([]), plt.yticks([])
plt.show()

But I get an error,

C:\Python27\pythonw.exe C:/Users/baqir/PycharmProjects/untitled/cdsk1.py
Traceback (most recent call last):
File "C:/Users/baqir/PycharmProjects/untitled/cdsk1.py", line 2, in <module>
from matplotlib import pyplot as plt
File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 29, in       <module>
from matplotlib.figure import Figure, figaspect
File "C:\Python27\lib\site-packages\matplotlib\figure.py", line 36, in <module>
from matplotlib.axes import Axes, SubplotBase, subplot_class_factory
File "C:\Python27\lib\site-packages\matplotlib\axes\__init__.py", line 4, in <module>
from ._subplots import *
File "C:\Python27\lib\site-packages\matplotlib\axes\_subplots.py", line 10, in <module>
from matplotlib.axes._axes import Axes
File "C:\Python27\lib\site-packages\matplotlib\axes\_axes.py", line 14, in <module>
from matplotlib import unpack_labeled_data

ImportError: cannot import name unpack_labeled_data `

I googled it but did not find any solution. Can anyone tell what here I m doing wrong?

Answer 1

I had the same error and fix it just now.My OS is Windows too, so you just need to upgrade your the version of matplotlib.I install matplotlib-1.3.1 result in import error and upgrade it to matplotlib-1.5.1 everything is OK.

Answer 2

I'm certain this is an installation issue after having installed an older version of matplotlib. Installing a new version of matplotlib on top of the old version did not fix this error for me however.

Edit: I fixed this by running uninstalling matplotlib twice. Matplotlib 1.5.1 was installed on my system, as well as a Matplotlib 1.2.0 egg.

pip uninstall matplotlib
pip uninstall matplotlib
pip install --upgrade matplotlib

---

Linux

I ended up having to install everything in a virtualenv to get past the error(even though I had the latest version of matplotlib in my system). You may need to install virtualenv via pip or your package manager.

virtualenv -p $(which python2) py2k
source py2k/bin/activate
pip install matplotlib numpy

---

Windows

you can use conda from Miniconda to install pre-compiled python modules (if you and don't want to got through the hell of pip on Windows)

conda create --name py2k python=2
activate py2k
conda install matplotlib numpy

You can also just use Anaconda which has matplotlib and numpy bundled in the Python 2 interpreter.