初始化一个非常大的pandas数据帧

import pandas as pd
import numpy as np

# 生成随机数据
data = np.random.rand(1000000, 10)

# 初始化数据帧
df = pd.DataFrame(data)

import pandas as pd

# 初始化空数据帧
df = pd.DataFrame()

# 逐行添加数据
for i in range(1000000):
    row = {'col1': value1, 'col2': value2, ...}  # 替换value1、value2等为实际的数值
    df = df.append(row, ignore_index=True)

import pandas as pd

# 从CSV文件读取数据并初始化数据帧
df = pd.read_csv('data.csv')