Understanding concept of %matplotlib inline and import chart

I got piece of code from google and trying to understand it which is helpful for me at this moment.

 %matplotlib inline from math import sin, pi import random import chart from matplotlib import rcParams rcParams.update({'font.size': 12}) 

The GPS Carrier

 f = 154 * 10.23e6 carrier = lambda x: sin(2*pi*f*x) chart.Plot('GPS L1 Carrier Wave', tend=8/f, sr=1.0e-12). signal(carrier, color=chart.blue).show() 

when I run the same code I get error showing no module named chart. Want to know what is matplotlib inline and chart function. While executing code it throws error no module named chart. Could not find even any module name chart

Thanks in advance.