Is there way to include a \u in an f-string, postponing the evaluation of the escape sequence after the formatting?
A practical example. Let's say I have (python3)
i="0222"
print(f'\u{i}')
This is invalid and returns
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 0-1: truncated \uXXXX escape
Is there a way to defer the evaluation of the escape sequence \u after the replacement of {i} in the string?
Is there way to include a \u in an f-string, postponing the evaluation of the escape sequence after the formatting?
No. Escapes sequences are executed during string parsing.
Just use the chr builtin, it takes a codepoint (as an integer) and returns the corresponding string.
If for some fool reason you really absolutely want to use f-strings, then you need to create the escapes themselves in the string object:
>>> i = 0x0222
>>> s = f'\\u{i:04x}'
then apply the "unicode_escape" codec, which decodes the escapes at runtime
>>> codecs.decode(s, encoding='unicode_escape')
'Ȣ'