string.format() with {} inside string as string [duplicate]

Question

Ponder that you have a string which looks like the following 'This string is {{}}' and you would like to transform it into the following 'This string is {wonderful}'

if you do 'This string is {{}}'.format('wonderful') it won't work. What's the best way to achieve this?

Answer 1

You just need one more pair of {}

'This string is {{{}}}'.format('wonderful')

Answer 2

you need triple brackets: two for the literal { and }and the pair in the middle for the format function.

print('This string is {{{}}}'.format('wonderful'))

Answer 3

Two brackets to get {} in line (escaping), and third as placeholder:

'This string is {{{}}}'.format('wonderful')