Question: After installing matplotlib successfully on my Fedora19,I tested my code written by python. 
Unfortunately,I got this ImportError .

```
$ python ren.py 

Traceback (most recent call last):

  File "ren.py", line 10, in <module>
    import matplotlib.pyplot as plt

  File "/usr/lib64/python2.7/site-packages/matplotlib/pyplot.py", line 26, in <module>
    from matplotlib.figure import Figure, figaspect

  File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 32, in <module>
    from matplotlib.image import FigureImage

  File "/usr/lib64/python2.7/site-packages/matplotlib/image.py", line 22, in <module>
    import matplotlib._png as _png

ImportError: libpng16.so.16: cannot open shared object file: No such file or directory

```

I have found the file "libpng16.so.16" and copied it to /usr/lib.
But nothing happened.
Any help will be appreciated.

Answer: 
copy libpng16.so.16 to /usr/lib/ may be ok.
in my computer(Fedora 19), libpng16.so.16 can be found in /usr/local/lib
Use the following:

```
sudo apt-get install libpng16-16

```