python - matplotlib is not worked with qgis -


i build python plugin qgis n wanna use matplotlib plot graph while importing

from matplotlib import pyplot plt

and got error

import error no module name backend_qt4agg

please me solve this. have used qgis 2.8 , python 2.7.5 , centos

i have used pip install matplotlib

i have used library pygal got importerror no moduel name pygal though installed works fine command prompt not in application


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