text: import math
  import pylab
  
  y_values = []
  x_values = []
  number = 0.0
  
  while number < math.pi*4:
      y_values.append(math.sin(number))
      x_values.append(number)
      number += 0.001
  
  pylab.plot(x_values,y_values,'ro')
  pylab.show()