编写程序，在文件夹中生成饭店营业额模拟数据文件 data.csv。并使用datetime模块获得用户用餐时长；使用re模块获得字符串中的名字、电话。

在Python中，你可以通过以下几个步骤来创建一个名为"data.csv"的模拟饭店营业额文件，并利用`datetime`模块获取用餐时长以及使用`re`模块提取名字和电话：

1. 首先，导入必要的库：

import csv
from datetime import datetime
import random
import re

2. 定义模拟数据的结构，比如每行包含日期、时间、顾客名称、电话和消费额：

def generate_data():
    # 一些示例数据
    customers = [
        ("张三", "13812345678", "午餐", random.randint(50, 200)),
        ("李四", "13987654321", "晚餐", random.randint(100, 300)),
        # 更多随机数据...
    ]

    with open("data.csv", "w", newline="", encoding="utf-8") as csvfile:
        fieldnames = ["Date", "Time", "Customer Name", "Phone", "Amount"]
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)

        writer.writeheader()  # 写入表头
        for customer in customers:
            date_time = datetime.now().strftime("%Y-%m-%d %H:%M")
            row = {
                "Date": date_time,
                "Time": date_time,
                "Customer Name": customer[0],
                "Phone": customer[1],
                "Amount": str(customer[2]),
            }
            writer.writerow(row)

3. 对于提取名字和电话的正则表达式，假设电话号码是11位数字，名字由汉字和英文字符组成：

def extract_info(text):
    name_pattern = r"[\u4e00-\u9fa5a-zA-Z]+"
    phone_pattern = r"\b\d{11}\b"
    
    match_name = re.search(name_pattern, text)
    match_phone = re.search(phone_pattern, text)

    if match_name:
        name = match_name.group()
    else:
        name = "Unknown"

    if match_phone:
        phone = match_phone.group()
    else:
        phone = "Unknown"

    return name, phone

# 使用示例
text = "欢迎张三先生致电13812345678订餐"
name, phone = extract_info(text)
print(f"Name: {name}, Phone: {phone}")

4. 将生成数据和提取信息的部分结合起来，可以循环地读取文件，处理每一行的数据：

if __name__ == "__main__":
    generate_data()

    # 打开已有的data.csv文件（如果存在），处理每一行数据
    with open("data.csv", "r", newline="", encoding="utf-8") as csvfile:
        reader = csv.DictReader(csvfile)
        for row in reader:
            text = f"{row['Customer Name']} 联系电话: {row['Phone']}"
            name, phone = extract_info(text)
            print(f"处理记录: {name} ({phone})")