I ran same program before. But don't know suddenly it's showing ImportError. I did not change anything in Anaconda. Then what's going wrong ?
If you get a numpy import error, the C-libraries are not on the path. This means that you conda environment isn't activated.
To use conda environments in Jupyter follow this instuction:
How to add your Conda environment to your jupyter notebook in just 4 steps
On a side note: Why are you trying to mix pip and conda installs? This is asking for trouble!