How to format string in python [duplicate]

Question

I just cannot to format of a string:

id = "3123123"
a = '{"classes": [], "field": {}}'.format(id)
print(a)

All suggestions will be nice !

Put a 0 in between the curly braces to signal, that the first parameter in format() corresponds to the first index (0) in your string. If you want to use more than one variable you can increment this number like: a = 'Some{0} is {1}'.format('thing', 'weird') Edit: To escape curly braces in a format string, use double braces like @Shijith did — DerHamm
– DerHamm, Commented Apr 20, 2020 at 14:53

rdas · Accepted Answer · 2020-04-20 14:53:16Z

3

Your formatting string clashes with the formatting placeholder specifier

You'll need to escape the { with {{

a = '{{"classes": [], "field": {{}}}}'.format(id)

And a make sure there is a placeholder for id in the formatting string with {}

answered Apr 20, 2020 at 14:53

rdas

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1 Comment

thanks a lot ! This was useful