如何将过去一年零六个月的数据从一个.txt提取到两个单独的.txt文件中，以'\t‘分隔？

import datetime

# 读取原始文件
with open('data.txt', 'r') as file:
    lines = file.readlines()

# 定义时间范围
start_date = datetime.datetime.now() - datetime.timedelta(days=3*365 + 6*30)  # 过去一年零六个月

# 分割数据
file1_lines = []
file2_lines = []

for line in lines:
    parts = line.strip().split('\t')
    if len(parts) >= 2:
        try:
            date = datetime.datetime.strptime(parts[0], '%Y-%m-%d')
            if date < start_date:
                file1_lines.append(line)
            else:
                file2_lines.append(line)
        except ValueError:
            print(f"Invalid date format: {parts[0]}")

# 写入新文件
with open('file1.txt', 'w') as file1:
    file1.writelines(file1_lines)

with open('file2.txt', 'w') as file2:
    file2.writelines(file2_lines)