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#coding:utf-8


'''
expr ::= term { (+|-) term }*

term ::= factor { (*|/) factor }*

factor ::= ( expr )
    |   NUM

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import os
import time
import sys


class Tail(object):

    def __init__(self, file_name):
        self.filename = file_name
        self.pos = 0

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#!/bin/bash
echo " = = = = = back up start @ `date` = = = = = "
BACKUP_DIR="/opt/data/backup"
DUMP_CMD="/usr/bin/mysqldump"
HOST="127.0.0.1"
PORT="3306"
USER="root"
PASSWORD="123456"
cd $BACKUP_DIR
TIMESTAMP=`date +%F-%H%M`

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package main 
import ( 
        "net" 
        "fmt" 
        "io" 
        "os" 
) 
func main() { 
        if len(os.Args) != 3 { 
                fatal("usage: netfwd local remote") 

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#coding:utf-8
import socket
import time
import os
import sys
from struct import pack

ARPOP_REQUEST = pack('!H', 0x0001)
ARPOP_REPLY = pack('!H', 0x0002)

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var cv = document.getElementById('cv');
var c = cv.getContext('2d');
var txtDiv = document.getElementById('txt');
var fileBtn = document.getElementById("up-button");
var img = new Image();
img.src = 'a.jpg';
img.onload = init; // 图片加载完开始转换
fileBtn.onchange = getImg;

// 根据灰度生成相应字符

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def int2bin(num):
    s = ''
    while num > 0:
        s = ('1' if num & 1 else '0') + s
        num >>= 1
    return s if s else '0'

if __name__ == "__main__":

    assert int2bin(12345) == bin(12345)[2:]

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#此类配置可以在命令行模式中输入show-options -g查询
set-option -g base-index 1                        #窗口的初始序号；默认为0，这里设置为1
set-option -g display-time 5000                   #提示信息的持续时间；设置足够的时间以避免看不清提示，单位为毫秒
set-option -g repeat-time 1000                    #控制台激活后的持续时间；设置合适的时间以避免每次操作都要先激活控制台，单位为毫秒
set-option -g status-keys vi                      #操作状态栏时的默认键盘布局；可以设置为vi或emacs
set-option -g status-right "#(date +%H:%M' ')"    #状态栏右方的内容；这里的设置将得到类似23:59的显示
set-option -g status-right-length 10              #状态栏右方的内容长度；建议把更多的空间留给状态栏左方（用于列出当前窗口）
#set-option -g status-utf8 on                      开启状态栏的UTF-8支持

#此类设置可以在命令行模式中输入show-window-options -g查询

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package main

import (
	"bytes"
	"encoding/binary"
	"fmt"
	"io/ioutil"
	"strconv"
)

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#coding:utf-8

from gevent import monkey
monkey.patch_all()
import logging
import gevent
import datetime

logging.basicConfig(level=logging.DEBUG)
LOGGER = logging.getLogger("GeventCelery")