如何从文本文件中读取特殊格式的坐标来计算它们之间的距离？

import re
import math

def calculate_distance(file_path):
    with open(file_path, 'r') as file:
        lines = file.readlines()
        for line in lines:
            coordinates = re.findall(r'\((-?\d+),(-?\d+)\)', line)
            if coordinates:
                x1, y1 = map(int, coordinates[0])
                x2, y2 = map(int, coordinates[1])
                distance = math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
                print(f"The distance between ({x1},{y1}) and ({x2},{y2}) is {distance:.2f} units.")

# 示例调用
calculate_distance('coordinates.txt')