在多个替换和子字符串中将字段转换为Decimal

import re
from decimal import Decimal

def convert_fields_to_decimal(fields, string):
    # 提取需要转换的字符串
    pattern = r'\d+\.\d+'  # 假设需要转换的字符串为小数形式
    matches = re.findall(pattern, string)

    # 遍历每个匹配到的字符串，将其转换为Decimal类型
    converted_fields = []
    for match in matches:
        decimal_value = Decimal(match)
        converted_fields.append(decimal_value)

    # 替换原始字段中的对应字符串
    for i, match in enumerate(matches):
        string = string.replace(match, str(converted_fields[i]))

    return string

# 示例用法
fields = ['field1', 'field2', 'field3']
string = 'field1: 3.14, field2: 2.718, field3: 1.414'
converted_string = convert_fields_to_decimal(fields, string)
print(converted_string)