生成指定大小的文件

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import random

def genSizeFile(fileName, fileSize):
    #file path
    filePath="Data"+fileName+".txt"

    # 生成固定大小的文件
    # date size
    ds=0
    with open(filePath, "w") as f:
        while ds<fileSize:
            f.write(str(round(random.uniform(-1000, 1000),2)))
            f.write("
")
            ds=os.path.getsize(filePath)
    # print(os.path.getsize(filePath))

# start here.
genSizeFile("20480k",20*1024*1024)