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# encoding: utf-8
""" return 返回的是完整的结果
    yield 返回的是一个值"""


def myzip1(*seqs):
    """使用返回值"""
    seqs = [list(S) for S in seqs]
    res = []
    while all(seqs):

PoplarYang

#!/usr/bin/env python
# coding: utf-8

import subprocess

def test(size=1024*64):
    """ pip默认为 64k"""
    print 'start'
    cmd = 'dd if=/dev/urandom bs=1 count=%d 2>/dev/null' % size
    p = subprocess.Popen(args=cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)

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#!/usr/bin/env python
# coding: utf-8

import os
import sys
from subprocess import Popen, PIPE

def getPidList(prog_name):
    """获取进程的所有PID
    输入：进程名

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DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'cmdb',
        'USER': 'root',
        'PASSWORD': '',
        'HOST': '127.0.0.1',
        'PORT': '3306',
        }
}

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db.collection.update(
   <query>,
   <update>,
   {
     upsert: <boolean>,
     multi: <boolean>,
     writeConcern: <document>,
     collation: <document>,
     arrayFilters: [ <filterdocument1>, ... ]
   }

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update_one(filter, update, upsert=False, bypass_document_validation=False, collation=None, array_filters=None, session=None)
Update a single document matching the filter.

>>> for doc in db.test.find():
...     print(doc)
...
{u'x': 1, u'_id': 0}
{u'x': 1, u'_id': 1}
{u'x': 1, u'_id': 2}
>>> result = db.test.update_one({'x': 1}, {'$inc': {'x': 3}})

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import json

# some JSON:
x =  '{ "name":"John", "age":30, "city":"New York"}'

# parse x:
y = json.loads(x)

# the result is a Python dictionary:
print(y["age"])

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# 行迭代
# while 循环法
while read line;do
    echo $line;
done < file.txt

# 命令行法
cat file.txt | (while read line;do echo $line;done)

# awk法

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function check_status() {
    local app_name=$1
    local app_port=$2
    app_port_c=$(ss -antu | grep -c $app_port)
    app_name_c=$(ps -ef | grep $app_name | grep -vc grep)
    echo 
}

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awk '{$5~/status/}{now=strftime("%T", $3/10000000);print now}' ky | sort | uniq -c | awk 'BEGIN{sum=0;count=0}{sum+=$1;count++}END{print sum/count}'