如何删除CSV中的所有标点符号、特殊字符，并将数字替换为"number“字符串？

import csv
import re

def remove_punctuation_and_replace_numbers(data):
    # 正则表达式模式，用于匹配标点符号和特殊字符
    pattern = r'[^\w\s]'
    
    # 遍历每个单元格
    for i in range(len(data)):
        for j in range(len(data[i])):
            cell = data[i][j]
            
            # 删除标点符号和特殊字符
            cell = re.sub(pattern, '', cell)
            
            # 判断是否为数字，并替换为"number"
            if cell.isdigit():
                cell = 'number'
            
            # 更新单元格数据
            data[i][j] = cell
    
    return data

# 读取CSV文件
with open('input.csv', 'r') as file:
    reader = csv.reader(file)
    data = list(reader)

# 处理CSV数据
processed_data = remove_punctuation_and_replace_numbers(data)

# 更新CSV文件
with open('output.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(processed_data)