在Python中删除CSV的整个价格列中的最后两位数字，还是在最后两位数字之前添加一个小数？

import csv

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

# 找到价格列的索引
header = data[0]
price_index = header.index('price')

# 删除最后两位数字
for row in data[1:]:
    price = row[price_index]
    row[price_index] = price[:-2]

# 将修改后的数据写回CSV文件
with open('data_modified.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(data)

import csv

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

# 找到价格列的索引
header = data[0]
price_index = header.index('price')

# 在最后两位数字之前添加小数
for row in data[1:]:
    price = row[price_index]
    row[price_index] = price[:-2] + '.' + price[-2:]

# 将修改后的数据写回CSV文件
with open('data_modified.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(data)