python生成指定大小的txt文档(MB） 来源：知乎
# !/user/bin/env python
# -*- coding:utf-8 -*-
import os
import time
# 获取username, 如chinaren
def getusername():
namelist = os.popen('echo %username%').readlines()
username = namelist[0].replace("\n", "")
# 获取当前的username
return username
# 获取时间和日期
def getnowdatatime(flag=0):
'''
flag = 0为时间和日期 eg:2018-04-11 10:04:55
flag = 1仅获取日期 eg:2018-04-11
flag = 2仅获取时间 eg:10:04:55
flag = 3纯数字的日期和时间 eg:20180411100455
'''
now = time.localtime(time.time())
if flag == 0:
return time.strftime('%Y-%m-%d %H:%M:%S', now)
if flag == 1:
return time.strftime('%Y-%m-%d', now)
if flag == 2:
return time.strftime('%H:%M:%S', now)
if flag == 3:
return time.strftime('%Y%m%d%H%M%S', now)
# 生成指定大小的TXT档
def generateTXTFile():
fileSize = 0
# 判断输入是否有误
while True:
size = input('请输入你想生成的TXT文件大小(MB):')
if size.strip().isdigit() != True:
print('只能输入整数，请重新输入!')
continue
else:
fileSize = int(size)
break
if fileSize >= 200:
print('正在生成TXT文件，请稍候... ...')
# 生成指定大小的TXT档
filename = getnowdatatime(3) + '_' + size + 'MB.txt'
print(f'文件名：{filename}')
# 设置文件保存的路径
filepath = 'C:\\Users\\' + getusername() + '\\Desktop\\'
f = open(filepath + filename, 'w')
# 获取开始时间
starttime = getnowdatatime()
startclock = time.perf_counter()
for i in range(fileSize):
if i >= 100:
if i % 100 == 0:
print(f'已生成{i//100 * 100}MB数据.')
for j in range(1024):
try:
f.write('100' * 512)
except KeyboardInterrupt:
print('\n异常中断:KeyboardInterrupt')
f.close()
exit(-1)
f.close()
print(f'文件已成生并保存在桌面, 文件大小:{fileSize}MB.\n')
print(f'DetailInfo:')
print(f'保存路径: {filepath + filename}')
print(f'开始时间:{starttime}')
print(f'结束时间:{getnowdatatime()}')
print(f'总共耗时:{( time.perf_counter() - startclock):<.3}sec.')
if __name__ == '__main__':
generateTXTFile()
