I want to use plt.plot(x,y) and plt.show().
When I use 'Idle.exe', I can use matplotlib.pyplot and numpy.
However, when I use 'IDLE (Python 3.4 GUI - 32 bit)', I cannot use matplotlib.pyplot and numpy.
I managed to solve the problem of numpy module, but I couldn't to matplotlib...
For reference, my OS is Windows 8.1.