在python中，如何从一列捕获一个值并显示在同一csv另一列中

import csv

with open('file.csv', 'r') as file:
    reader = csv.reader(file)

rows = []
for row in reader:
    # 捕获需要的值并添加到同一行的另一列
    captured_value = row[0]  # 假设需要捕获的值在第一列
    row.append(captured_value)  # 将捕获的值添加到同一行的末尾
    rows.append(row)

file.close()

with open('file.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(rows)

import csv

# 打开CSV文件并创建一个csv.reader对象
with open('file.csv', 'r') as file:
    reader = csv.reader(file)

    rows = []
    for row in reader:
        # 捕获需要的值并添加到同一行的另一列
        captured_value = row[0]  # 假设需要捕获的值在第一列
        row.append(captured_value)  # 将捕获的值添加到同一行的末尾
        rows.append(row)

# 关闭CSV文件
file.close()

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