number_format()

Format a number with grouped thousands and fixed decimals.

Implementation

Args: value: The number to format precision: Number of decimal places decimal_sep: Character for the decimal point thousands_sep: Character for the thousands grouping Returns: The formatted number string, or "" if invalid

Example

number_format(1234567.89)

Expected output: "1,234,567.89"

Source Code

                        def number_format(
    value: Any,
    precision: int = 0,
    decimal_sep: str = ".",
    thousands_sep: str = ","
) -> str:
    if not isinstance(value, (int, float)) or not math.isfinite(value):
        return ""
    # Round to the given precision
    fmt = f"{{:,.{precision}f}}"
    result = fmt.format(value)
    # Python always uses ',' for thousands and '.' for decimal
    if thousands_sep != ",":
        result = result.replace(",", "TMP")
    if decimal_sep != ".":
        result = result.replace(".", decimal_sep)
    if thousands_sep != ",":
        result = result.replace("TMP", thousands_sep)
    return result
                    