python脚本实现将excel表格数据拆分成两个文件

import csv

input_file = 'input.csv'
output_file_1 = 'output_part1.csv'
output_file_2 = 'output_part2.csv'

# 读取所有数据
with open(input_file, newline='', encoding='utf-8') as f_in:
    reader = csv.reader(f_in)
    header = next(reader)  # 读取表头
    rows = list(reader)

# 计算拆分点
split_index = 20000

# 分割数据
part1 = rows[:split_index]
part2 = rows[split_index:]

# 写入第一个文件
with open(output_file_1, 'w', newline='', encoding='utf-8') as f_out1:
    writer = csv.writer(f_out1)
    writer.writerow(header)
    writer.writerows(part1)

# 写入第二个文件
with open(output_file_2, 'w', newline='', encoding='utf-8') as f_out2:
    writer = csv.writer(f_out2)
    writer.writerow(header)
    writer.writerows(part2)

print(f"拆分完成：{len(part1)} 条数据写入 {output_file_1}，{len(part2)} 条写入 {output_file_2}")

pip install openpyxl

import openpyxl

input_file = 'input.xlsx'
output_file_1 = 'output_part1.xlsx'
output_file_2 = 'output_part2.xlsx'

wb = openpyxl.load_workbook(input_file)
ws = wb.active

# 读取所有行数据（包含表头）
rows = list(ws.values)
header = rows[0]
data_rows = rows[1:]

split_index = 20000
part1 = data_rows[:split_index]
part2 = data_rows[split_index:]

def save_excel(filename, header, data):
    wb_new = openpyxl.Workbook()
    ws_new = wb_new.active
    ws_new.append(header)
    for row in data:
        ws_new.append(row)
    wb_new.save(filename)

save_excel(output_file_1, header, part1)
save_excel(output_file_2, header, part2)

print(f"拆分完成：{len(part1)} 条数据写入 {output_file_1}，{len(part2)} 条写入 {output_file_2}")