You don’t see NON;)

lenToCompare = len(string)-len(sub_string)
print(sum([1 for i in range(lenToCompare+1) if string[i:i+len(sub_string)]== sub_string])

string = “LMNONON”
sub_string =”NON”
2
[/sourcecode ]

Exploring power of JOIN

r, c = map(int,input().split())
pattern = [('.^.'*(2*i + 1)).center(c, '*') for i in range(r//2)]
print('\n'.join(pattern + ['PYTHON'.center(c, '*')] + pattern[::-1]))

output:
************.^.************
*********.^..^..^.*********
******.^..^..^..^..^.******
***.^..^..^..^..^..^..^.***
***********PYTHON**********
***.^..^..^..^..^..^..^.***
******.^..^..^..^..^.******
*********.^..^..^.*********
************.^.************

numpy Notes

Link to my numpy Notes on Git:

https://github.com/HarshaProjects/PythonTutor/blob/master/NumpyNotes.ipynb