f 字符串中的 Escaping 字符

Question

I have run into the following issue with the f-string :

>>> a='hello'

# how to print '{hello}' ?

>>> f'{{a}}'
'{a}'

>>> f'\{{a}\}'
  File "<stdin>", line 1
SyntaxError: f-string: single '}' is not allowed

# doing it without f-strings
>>> '{' + a + '}'
'{hello}'

How do I escape chars in an fstring?

Answer 1

You need triple braces:

f'{{{a}}}'

The two outer {} s "escape" and evaluate to {...} , then the inner {} is used for formatting (or at least that's how I interpret it).