"\{x\}" includes the backslashes into the string literally. So even if that worked for f-strings it would change the meaning for older Python versions. Requirin

"\{x\}" includes the backslashes into the string literally. So even if that worked for f-strings it would change the meaning for older Python versions. Requiring people to update common old code is also just something to avoid unless necessary. The correct way to escape braces in f-strings is with double braces, so f"{{x}}". This is consistent with the way str.format works. f-string syntax is very similar to str.format syntax in general.