printing hollow triangle in python

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2# Generating Hollow Pyramid Pattern Using Stars
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4row = int(input('Enter number of rows required: '))
5
6for i in range(row):
7    for j in range(row-i):
8        print(' ', end='') # printing space required and staying in same line
9    
10    for j in range(2*i+1):
11        if j==0 or j==2*i or i==row-1:
12            print('*',end='')
13        else:
14            print(' ', end='')
15    print() # printing new line
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