Reports

Here is link to your solution in reddit: https://www.reddit.com/r/excel/comments/13wzhod/pythons_fstring_in_excel/

=LAMBDA(f_string, values, LET(
  is_labeled, NOT(ISNUMBER(FIND("{}", f_string))),
  is_numbered, IFERROR(ISNUMBER(VALUE(
    TEXTAFTER(TEXTBEFORE(f_string, "}"), "{"))), FALSE),
  values, IF(AND(ROWS(values) = 1, OR(is_numbered, NOT(is_labeled))),
    TRANSPOSE(values),
    values),
  value_pairs, IFS(
    is_numbered, HSTACK(SEQUENCE(ROWS(values)),
      IF(ROWS(values) = 1, TRANSPOSE(values), values)),
    COLUMNS(values) = 1, WRAPROWS(values, 2),
    TRUE, values),
  pair_rows, SEQUENCE(ROWS(value_pairs)),
  unlabeled, REDUCE(f_string, values, 
    LAMBDA(string, value,
      IFERROR(SUBSTITUTE(string, "{}", value, 1), 
        string))),
  labeled, REDUCE(f_string, pair_rows, 
    LAMBDA(string, pair_row, LET(
      label, INDEX(value_pairs, pair_row, 1),
      value, INDEX(value_pairs, pair_row, 2),
      IFERROR(SUBSTITUTE(string, "{" & label & "}", value), 
        string) ))),
  IF(is_labeled, labeled, unlabeled) ))

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