regex in for loop

Question

How do you use a regex with a for loop in Python

 example data
 abc 1 xyz 0
 abc 2 xyz 1
 abc 3 xyz 2

How do you write regex for something like below

for i in range(1, 3):
     re.match(abc +i xyz +(i-1))

Answer 1

This substitutes i into the first %s and i-1 into the second %s

re.match("abc %s xyz %s"%(i,i-1), data)

another way to write it would be

re.match("abc "+str(i)+" xyz "+str(i-1), data)