Python Substring replacement

Question

i need to replace the substring in the main string

mainstr='"Name":"xxx","age":"{"This":"has to","be":"replaced"}","dept":"cse"'
substr='"{"This":"has to","be":"replaced"}"'

Desired output:

mainstr="Name:xxx","age":"checked","dept":"cse"

I tried the following code:

for substr in mainstr:

    mainstr=mainstr.replace(substr,"checked")
    print "Output=",mainstr

On executing i got,

Output="Name:xxx","age":"{This":"has to","be":"replaced"}","dept":"cse"

Why the substr not getting replaced??..

Please fix the apostrophe markings in your question so it actually is a string :) — TerryA
– TerryA, Commented Nov 18, 2013 at 7:23

TerryA · Accepted Answer · 2013-11-18 07:31:47Z

4

You're iterating through the string, which isn't doing what you'd expect. Iterating through a string goes through each character.

All you need to do is:

mainstr = '"Name:xxx","age":"{This":"has to","be":"replaced"}","dept":"cse"'
substr = '{This":"has to","be":"replaced"}'
print "Output = ", mainstr.replace(substr, 'checked')
#                ^ The comma here is important.

NOTE: The code isn't working for you because substr = '"{This and not substr = '{This". Notice the quotation mark at the beginning.

edited Nov 18, 2013 at 7:31

answered Nov 18, 2013 at 7:25

TerryA

60.2k11 gold badges122 silver badges148 bronze badges

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

1 Comment

Chuvi Over a year ago

@harido: MAy be my mistake in rest part of the pgm.. will check it out.... thank you

Collectives™ on Stack Overflow

Python Substring replacement

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related