Alphabet Pattern 'N' in Python

In this Blog I am printing pattern 'N' using Python.

Code:

str="";
for Row in range(0,7):
    for Col in range(0,7):
        if (Col == 1 or Col == 5 or (Row == Col and Col != 0 and Col != 6)):
            str=str+"*"
        else:
            str=str+" "
    str=str+"\n"
print(str);

Output: