import pandas as pd
import random
import string

# 配置
rows = 10000
cols = 20

# 生成列名
columns = [f"列{i+1}" for i in range(cols)]

# 生成数据
data = []
for _ in range(rows):
    row = []
    for _ in range(cols):
        # 随机数字或者随机字符串
        if random.random() < 0.5:
            row.append(random.randint(1, 10000))  # 随机数字
        else:
            row.append(''.join(random.choices(string.ascii_uppercase, k=5)))  # 随机5个字母
    data.append(row)

# 创建 DataFrame
df = pd.DataFrame(data, columns=columns)

# 保存 Excel
df.to_excel("随机20列10000行.xlsx", index=False)

# 或者保存 CSV
df.to_csv("随机20列10000行.csv", index=False, encoding='utf-8-sig')

print("生成完成！")