嘿！我用python帮我干这些事

　　python 无疑是当下火上天的语言，但是我们又不拿来工作，那么能拿来干啥呢？我是这么干的。

1. 平时工作开发用不上，就当个计算器吧！

python
# 加减乘除
>>> (3 + 2) - 5 * 1
5
# 位运算
>>> 3 << 2
12
# x ^ y 幂次方运算,不能开方运算
>>> 3 ** 2
9
# 用另一种计算幂次方的运算，可以开方运算
>>> pow(9, 0.5)
3.0
# 作进制转换，如二进制转换，十进制转n进制
>>> bin(2)
'0b10'
>>> hex(25)
'0x19'
>>> oct(10)
'012'
>>> int('e0', 16)
224
# 将十进制转换为二进制，以全0占位形式显示二进制，更方便查看,默认为32位，使用如下图所示
def decbin(i, bit=32):
　　return (bin(((1 << bit) - 1) & i)[2:]).zfill(bit)

2. 做简单爬虫

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import urllib,urllib2
import re
import os
import HTMLParser
dirbase = '/tmp'
urlbase = 'http://hg.openjdk.java.net'
url= urlbase + '/jdk8u/jdk8u/jdk/file/dddb1b026323/src'        #/jdk,/hotspot
skip_to_p = ''
skip_find = False;
textmod ={'user':'admin','password':'admin'}
textmod = urllib.urlencode(textmod)
print(url)
req = urllib2.Request(url = '%s%s%s' % (url,'?',textmod))
res = urllib2.urlopen(req)
res = res.read()
alink = re.findall(r'<a',res)
allflist = []

table=re.findall(r'<tbody class="stripes2">(.+)</tbody>',res, re.S)

harr = re.findall(r'href="(/jdk8u[w/._]+)">(?![up])', table[0])

def down_src_recursion(harr):
  global allflist,skip_find;
  if(not harr):
    return False;
  i=0; arrlen = len(harr)
  lock_conflict_jump_max = 2;   # 遇到文件锁时跳过n个文件,当前仍需跳过的文件数量
  lock_conflict_jumping = 0;
  print("in new dir cur...")
  if(len(allflist) > 1500):
     print('over 1500, cut to 50 exists...')
     allflist = allflist[-800:]
  for alink in harr:
    i += 1;
    alink = alink.rstrip('/')
    if(skip_to_p and not skip_find):
    if(alink != skip_to_p):
      print('skip file, cause no find..., skip=%s,now=%s' % (skip_to_p, alink))
      continue;
    else:
      skip_find = True;
    if(alink in allflist):
      print('目录已搜寻过:' + alink)
      continue;
    pa = dirbase + alink
    if(os.path.isfile(pa)):
      print('文件已存在，无需下载: ' + pa)
      continue;
    lockfile=pa+'.tmp'
    if(os.path.isfile(lockfile)):
　　　 lock_conflict_jumping = lock_conflict_jump_max;
      print('文件正在下载中，跳过+%s...: %s' % (lock_conflict_jumping, lockfile))continue; 
    else:
      if(lock_conflict_jumping > 0):
         lock_conflict_jumping -= 1;
         print('文件正在下载中，跳过+%s...: %s' % (lock_conflict_jumping, lockfile))continue;
    # 首先根据后缀把下载中的标识标记好，因为网络下载时间更慢，等下载好后再加标识其实已为时已晚
    if(pa.endswith(('.gif','.jpg','.png', '.xml', '.cfg', '.properties', '.make', '.sh', '.bat', '.html', '.c','.cpp', '.h', '.hpp', '.java', '.1'))):
       os.mknod(lockfile);
    reqt = urllib2.Request(urlbase + alink)
    rest = urllib2.urlopen(reqt)
    rest = rest.read()
    allflist.append(alink)
    if(rest.find('class="sourcefirst"') > 0):
       print('这是个资源文件:%s         %d/%d' % (alink, i, arrlen))
       if(not os.path.isfile(lockfile)):
          os.mknod(lockfile);
       filename = alink.split('/')[-1]
       linearr = re.findall(r'<span id=".+">(.+)</span>', rest)
       fileObject = open(dirbase + alink, 'w')
       for line in linearr:
          try:
            line = HTMLParser.HTMLParser().unescape(line)
          except UnicodeDecodeError as e:
            print('oops, ascii convert error accour:', e)
          fileObject.write(line + '
')
       fileObject.close()
       os.remove(lockfile); 
    else:
      print('这是目录:%s        %d/%d' % (alink, i, arrlen))
      if(not os.path.exists(pa)):
         print('创建目录:%s' % alink)
         os.makedirs('/tmp' + alink, mode=0777)
      ta=re.findall(r'<tbody class="stripes2">(.+)</tbody>',rest, re.S)
      ha = re.findall(r'href="(/jdk8u[w/._]+)">(?![up])', ta[0])
      down_src_recursion(ha)

# go...
down_src_recursion(harr);

以上python2 版本的爬虫，在python3中则要改编下呢！

#!/usr/bin/python
# -*- coding: UTF-8 -*-
# for python3

import urllib.parse
import urllib.request
import re
import os
import html
dirbase = '/tmp'
urlbase = 'http://hg.openjdk.java.net'
url= urlbase + '/jdk8u/jdk8u/jdk/file/478a4add975b/src/share/classes/sun/misc'
#skip_to_p = '/jdk8u/jdk8u/jdk/file/478a4add975b/src/share/classes/sun/misc'
skip_to_p = ''
skip_find = False;
textmod ={'user':'admin','password':'admin'}
textmod = urllib.parse.urlencode(textmod)
print(url)
res = urllib.request.urlopen(url = '%s%s%s' % (url,'?',textmod))
res = res.read().decode('utf-8')
alink = re.findall(r'<a', res)
allflist = []

table=re.findall(r'<tbody class="stripes2">(.+)</tbody>',res, re.S)

harr = re.findall(r'href="(/jdk8u[w/._]+)">(?![up])', table[0])

def down_src_cur(harr):
    global allflist,skip_find;
    if(not harr):
        return False;
    i=0; 
    arrlen = len(harr);
    print("- In new dir cur...")
    if(len(allflist) > 1500):
        print('- Over 1500, cut to 50 exists...')
    allflist = allflist[-800:]
    for alink in harr:
        i += 1;
        alink = alink.rstrip('/')
        if(skip_to_p and not skip_find):
            if(alink != skip_to_p):
                print('- Skip file, cause no find..., skip=%s,now=%s' % (skip_to_p, alink))
                continue;
            else:
                skip_find = True;
        if(alink in allflist):
            print('- Searched before:' + alink)
            continue;
        rest='';
        try:    
            res = urllib.request.urlopen(urlbase + alink)
            rest = res.read().decode('utf-8')
        except Exception as e:
            print(e)
            print(" ERROR accour, continue;")
            continue;
        allflist.append(alink)
        if(rest.find('class="sourcefirst"') > 0):
            print('- Code resourse:%s         %d/%d' % (alink, i, arrlen))
            filename = alink.split('/')[-1]
            linearr = re.findall(r'<span id=".+">(.+)</span>', rest)
            fileObject = open(dirbase + alink, 'w')
            for line in linearr:
                fileObject.write(html.unescape(line) + '
')
            fileObject.close()
        else:
            pa = dirbase + alink
            print('- Directory:%s        %d/%d' % (alink, i, arrlen))
            if(not os.path.exists(pa)):
                print('makedirs:%s' % alink);
                os.makedirs('/tmp' + alink, mode=0o777 );
            ta=re.findall(r'<tbody class="stripes2">(.+)</tbody>',rest, re.S)
            ha = re.findall(r'href="(/jdk8u[w/._]+)">(?![up])', ta[0])
            # 递归爬取解析
            down_src_cur(ha)

down_src_cur(harr);

做文件搜索，替换：

4. 做简单代码验证

# 做简单字符查找验证
>>> '234234fdgdfs'.find('f')
6
>>> '234234fdgdfs'.index('f')
6
>>> '234234fdgdfs'[2:5]
'423'
# 做正则匹配
>>> re.findall(r'[a-zA-Z0-9]*.[a-zA-Z1-9]*[.|com]*', 'www.baidu.com')
['www.baidu.com']

5. 写个运维脚本，监听本机8080端口的运行状态，如果发现挂了，就发送邮件通知主人，并重启服务器。

#!/usr/bin/env python
#!coding=utf-8
import os
import time
import sys
import smtplib
from email.mime.text import MIMEText
 
def send_email (warning):
    msg = MIMEText(warning)
    msg['Subject'] = 'python send warning mail'
    msg['From'] = '测试了<rootrr@163.com>'
    try:
       smtp = smtplib.SMTP()
       to_mail = 'xx@163.com'
       from_mail = 'xx@163.com'
       smtp.connect(r'smtp.qiye.163.com')
       smtp.login('xx@163.com', 'xxx123')
       smtp.sendmail(from_mail, to_mail, msg.as_string())
       smtp.close()
       print('send mail to %s, content is: %s' % (to_mail, msg))
    except Exception as e:
       print("Send mail Error: %s" % e)
# 监听状态中。。。
while True:
    http_status = os.popen('netstat -tulnp | grep ":8080"','r').readlines()
    try:
        if http_status == []:
            os.system('service tomcat7 start')
        time.sleep(3)    # 等待启动
            new_http_status = os.popen('netstat -tulnp | grep ":8080"','r').readlines()
            str1 = ''.join(new_http_status)
            is_port = -1;
            send_email(warning = "8080 port shutdown, This is a warning!!!")  # 发送通知
        try:
              is_port = str1.split()[3].split(':')[-1]
        except IndexError, e:
          print("out of range:", e)
            if is_port != '8080':
                print 'tomcat 启动失败'
            else:
                print 'tomcat 启动成功'
        else:
            print '8080端口正常'
        time.sleep(5)
    except KeyboardInterrupt:
        sys.exit('out order
')  

6. 科学计算，大数据，图形识别。。。  

　　看工作需要！

以下命令为反向kill某个端口的服务

# netstat -tunlp | grep ':8080' | awk '{split($7, arr, "/"); print(arr[1])}' | kill -9