转换具有句点而不是逗号的浮点数？

float_number = 123.456
comma_number = float_number.replace(".", ",")
print(comma_number)

import locale

locale.setlocale(locale.LC_NUMERIC, "en_US.UTF-8")
float_number = 123.456
comma_number = locale.format_string("%.2f", float_number)
print(comma_number)