How can I print literal curly-brace characters in python string and also use .format on it?

Question

x = \" \\{ Hello \\} {0} \"
print(x.format(42))

gives me : Key Error: Hello\\\\

I want to print the output: {Hello} 42

Answer 1

You escape it by doubling the braces.

Eg:

x = "{{ Hello }} {0}"
print(x.format(42))