Bug summary Once I type " import matplotlib.pyplot as plt" and run it, jupyter always returns： ＂Matplotlib is building the font cache; this may take a moment.＂ ＃Then the return messages will end up as ...

a lightweight library that outputs the main colormaps that can be displayed by imshow in matplotlib.pyplot in numpy format at high speed. it may be more accurate to say that it is instantly usable ...