[FIXED] How to replace variable with actual value inside the double quotes in Python?

Issue

I have one variable val = "O'brien" and I want to create a following string using this variable. -->

s1 = "{\"id1\":\"O'brien\"}" 

I tried with this:

s1 = "{\"id1\":\"'{}'.format(x)\"}"

However, It's giving me literal values as

'{"id1":"\'{}\'.format(x)"}'

What I want instead is

s1 = "{\"id1\":\"O'brien\"}"

So that, I can make it dictionary using

json.loads(s1)

Which will give me this output:

{'id1': "O'brien"}. 

I tried with many ways but couldn't get it, please suggest some good ways

Solution

There are multiple ways you can format your string, but this is how I would do it using an f string;

val = "O'brien"
s1 = f"{{\"id1\":\"{val}\"}}"

s1 is then equal to

{"id1":"O'Brien"}

If you want to use .format(x) it needs to be outside the outermost quote and you need to escape the outermost curly brackets

s1 = "{{\"id1\":\"{}\"}}".format(val)

Answered By - Brandon Kauffman