import re
import random


def camel_to_snake(name: str) -> str:
    # 匹配大写字母，并在前面加上下划线，然后转换为小写
    return re.sub(r'(?<!^)(?=[A-Z])', '_', name).lower()


def convert_columns_to_snake_case(columns: str) -> str:
    # 拆分字符串为字段列表，去除空格
    fields = [field.strip() for field in columns.split(",")]
    # 转换每个字段为下划线格式
    snake_case_fields = [camel_to_snake(field) for field in fields]
    # 重新组合回逗号分隔的字符串
    return ", ".join(snake_case_fields)


def random_float():
    # 生成一个随机的浮点数并四舍五入到14位小数
    return round(random.random(), 14)