I use the Anaconda Python distribution: Python 2.7 x64 with Windows 7 SP1 x64 Ultimate.
When I do import matplotlib.pyplot I get ImportError: DLL load failed: The specified module could not be found.. What could be the issue?
Full error stack:
Traceback (most recent call last):
File "C:\svn\hw4\code\test_con.py", line 1, in <module>
import matplotlib.pyplot
File "C:\Anaconda\lib\site-packages\matplotlib\pyplot.py", line 27, in <module>
import matplotlib.colorbar
File "C:\Anaconda\lib\site-packages\matplotlib\colorbar.py", line 34, in <module>
import matplotlib.collections as collections
File "C:\Anaconda\lib\site-packages\matplotlib\collections.py", line 27, in <module>
import matplotlib.backend_bases as backend_bases
File "C:\Anaconda\lib\site-packages\matplotlib\backend_bases.py", line 56, in <module>
import matplotlib.textpath as textpath
File "C:\Anaconda\lib\site-packages\matplotlib\textpath.py", line 22, in <module>
from matplotlib.mathtext import MathTextParser
File "C:\Anaconda\lib\site-packages\matplotlib\mathtext.py", line 63, in <module>
import matplotlib._png as _png
ImportError: DLL load failed: The specified module could not be found.
conda update -f numpy, conda update -f libpng, and conda update -f matplotlib did not help.
Output of conda list matplotlib:
C:\Anaconda>conda list matplotlib
# packages in environment at C:\Anaconda:
#
matplotlib 1.4.3 np110py27_2
matplotlib-venn 0.11 <pip>
The issue appeared after running conda update --all.
I have had this problem as well. It seems to have cropped up in the last week or two. It seems like something in the scipy stack was compiled incorrectly. In the near term:
conda install anaconda
will roll your system back to a stable anaconda distribtution.
I fixed this on my Windows machine by adding [Anaconda]/Library/bin to my PATH.
I fixed this by installing libpng:
conda install libpng
I suppose the related issue is here:
https://github.com/conda/conda/issues/1753
I solved the same problem by re-installing Anaconda.
The SciPy stack which came by default with Anaconda was corrupted in my case.
conda and pip are two different package managers which you can use to install python packages. conda can install various packages, it installs python itself as a package. pip caters to python users.
The conda packages were corrupted, so removing that package, which came by default, and installing it again using pip worked for me.
Try the following:
1. Create a new environment
This step is performed only as a safety measure. You can skip this step.
Open Anaconda prompt and
conda create --name testtrial python=3 //install whichever version of Python you want
activate testtrial
2. Removing and installing new packages
conda remove matplotlib //required only if you skipped the first step and are working in the default(root) environment
pip install matplotlib
That should solve the problem.
A quick guide on working with conda.
Ensure you have closed all python stuff when you run this. Using the following code at the command prompt (not ipython prompt) produces an environment named "working" with Anaconda 2.2.0, Cython 0.22, Numpy 1.9.2 py33_0, Pandas 0.15.2, and Python 3.3.5.
conda create -n working python=3 anaconda
To then use the environment run
activate working
Now you can launch ipython or notebook and (at a minimum) matplotlib should import.
I met the same error prompt. At last I found that I open the jupyter notebook in a different enviroment, not the enviroment that I used before. It means the module is not in your directory of your jupter noetbook enviroment. So I just open jupyter notebook in the original enviroment, the problem solved.
Try downgrading to a lower version, this command worked for me:
conda install libpng=1.6.22
This downgrades matplotlib and some other packages too, but seems to play well together.
