#  Demonstration code for Scientific Computing class,
#  http://www.math.nyu.edu/faculty/goodman/teaching/SciComp2022/
#  GraySlate.py
#  uses Python 3 and Numpy
#  Python Classes Demo

#  Define the GraySlate class with a constructor, some data, and a
#  member function

class GraySlate:
   """A class with a constructor and a function"""
   
   def __init__( self, input):
      """Remember the input n"""
      self.n = input
      
   def add_n( myself, x):   # the first argument doesn't have to be called "self",
      return x + myself.n   # but it should be.