Replace string characters per elements in a list Python

Question

I have the following string in python:

'this is my string (x,x,x,x)'

I want to replace each x per each number in this list:

[1,2,3,4]

So, the final output should be this:

'this is my string (1,2,3,4)'

I have tried to solve it with different approaches but I can't do it.

I don't know if there is an efficient way to do this.

• quamrana: Please update your question with the code you have tried.

Answer 1

What about this one?

'this is my string (x,x,x,x)'.replace('x','{}').format(*[1,2,3,4])

• lenik: 'this is my string (x,x,x,x)'.replace('x','{}').format(*[1,2,3,4]) ?

Answer 2

here the solution

s = 'this is my string (x,x,x,x)' 
s 
'this is my string (x,x,x,x)'
for i in range(1, len(s.split('x'))): 
 s = s.replace('x', str(i), 1) 
s 
'this is my string (1,2,3,4)'

to prevent malcontent you can use s.count('x,') + 1 instead of len(s.split('x')) if you have x in your string

• lenik: len(s.split('x')) -> s.count('x') ??
• lenik: s.count('x,') -- the last x does not have a comma afterwards.
• Beny Gj: @lenik that why i have added plus 1 to omit the last one
• lenik: how come your code does not use the sample list [1,2,3,4] ? please, bear in mind, that the numbers are just a place holders, the actual values can be different.
• Beny Gj: @lenik yea i know but , he didn't say that what the requirement , i only suggested this way , of course he can iterate on is own list