Error in string replace function in python

Question

Given a string and a pattern, Replace all the continuous occurrence of pattern with a single X in the string. For a clear view see the example below.

Input:

The first line of input contains an integer T denoting the number of test cases.
The first line of each test case is string str.
The second line of each test case contains a string s,which is a pattern.

Output:

Print the modified string str.

Constraints:

1 ≤ T ≤ 100
1 ≤ size of str,s ≤ 1000

Example:

Input

2
abababcdefababcdab
ab
geeksforgeeks
geeks

Output

XcdefXcdX
XforX

code:-

n = int(raw_input())
for i in range(n):
  x=raw_input()
  y=raw_input()
  x1=x.replace(y,"X")
  x2=""
  count=0
  for i in x1:
    if i=='X':
      if count==0:
        x2+=i
        count+=1
      else:
        count+=1
        ## do nothing         
    elif i!='X':
      count=0
      x2+=i
print (x2)

The original string might already contain "XX", in which case you don't want to replace this by just "X". — Sven Marnach
– Sven Marnach, Commented Feb 15, 2016 at 14:15

ᴀʀᴍᴀɴ · Accepted Answer · 2016-02-15 14:22:52Z

1

My answer to this question , first I replace all occurnce of substring with X and then replace all sequent X's with one X:

n = int(input())
for i in range(n):
    x = input()
    y = input()
    x1 = x.replace(y,"X")
    flag = False
    new_x1 = ""
    for i in x1:
        if i == "X" and flag == False:
            flag = True
            new_x1 += i
        elif i != "X" :
            flag = False
            new_x1 += i
    print (new_x1)

OutPut:

2
abababcdefababcdab
ab
#XcdefXcdX
geeksforgeeks
geeks
#XforX

answered Feb 15, 2016 at 14:22

ᴀʀᴍᴀɴ

4,5368 gold badges41 silver badges61 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

danidee · Accepted Answer · 2016-02-15 14:36:35Z

0

a simpler answer with regexp

import re
n = int(input())
for i in range(n):
    x = input()
    y = input()
    x1 = x.replace(y,"X")

    final = re.sub(r'(.)\1{1,}', r'\1', x1)
    print (final)

The regexp will replace any character (x) that occurs more than once

answered Feb 15, 2016 at 14:36

danidee

9,6342 gold badges39 silver badges58 bronze badges

Collectives™ on Stack Overflow

Error in string replace function in python

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related