node

node》

http，route，fs，path，util，createReadStream，createWriteStream

全局对象

__filename    __dirname   process  settimeout setinterval console

// 压缩 input.txt 文件为 input.txt.gz
fs.createReadStream('input.txt')
  .pipe(zlib.createGzip())
  .pipe(fs.createWriteStream('input.txt.gz'));

// 解压 input.txt.gz 文件为 input.txt
fs.createReadStream('input.txt.gz')
  .pipe(zlib.createGunzip())
  .pipe(fs.createWriteStream('input.txt'));

koa》

npm install koa-generator -g  koa2  prj

koa-router

koa-bodyparser

koa-cors

sequelize

mysql

co-mysql

flask》

pip install flask