r k's questions

from matplotlib import pyplot as plt

/home/rishabh/.local/lib/python2.7/site-packages/matplotlib/colors.py:680:    
MatplotlibDeprecationWarning: The is_string_like function was deprecated in version 2.1.  
  not cbook.is_string_like(colors[0]):

Now it's showing this error.

from matplotlib.fontconfig_pattern import parse_fontconfig_pattern File "/home/rishabh/.local/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py", line 28, in from backports.functools_lru_cache import lru_cache ImportError: No module named functools_lru_cache

I have installed matplotlib for Python using pip which was completed without error. Yet I get this error when I try to import it:

import matplotlib
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/rishabh/.local/lib/python2.7/site-packages/matplotlib/__init__.py", line 131, in <module>
    from matplotlib.rcsetup import defaultParams, validate_backend, cycler
  File "/home/rishabh/.local/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 29, in <module>
    from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
  File "/home/rishabh/.local/lib/python2.7/site-packages/matplotlib/fontconfig_pattern.py", line 28, in <module>
    from backports.functools_lru_cache import lru_cache
ImportError: No module named functools_lru_cache