Simple example of creating a file in Python3.5

#coding=utf-8
'''
Created on 2012-5-29
@author: xiaochou
'''
import os
import time
def nsfile(s):
 '''The number of new expected documents'''
 #判断文件夹是否存在，如果不存在则创建
 b = os.path.exists("E:\\testFile\\")
 if b:
  print("File Exist!")
 else:
  os.mkdir("E:\\testFile\\")
 #生成文件
 for i in range(1,s+1):
  localTime = time.strftime("%Y%m%d%H%M%S",time.localtime())
  #print localtime
  filename = "E:\\testFile\\"+localTime+".java"
  #a:以追加模式打开（必要时可以创建）append;b:表示二进制
  f = open(filename,'ab')
  testnote = 'private String username'
  f.write(testnote.encode('utf-8'))
  f.close()
  #输出第几个文件和对应的文件名称
  print("file"+" "+str(i)+":"+str(localTime)+".txt")
  time.sleep(1)
 print("ALL Down")
 time.sleep(1)
if __name__ == '__main__':
 s = int(input("请输入需要生成的文件数："))
 nsfile(s)