常用python日期、日志、获取内容循环的代码片段是什么

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近段时间对shell脚本和python进行了梳理，将一些脚本中常用的内容，考虑多种方法整理出来，形成有用的代码片段，这样就可以在需要的时候直接使用，也可以用于备忘和思考。
本次整理的代码片段有： python中日期、时间常用获取方法； 记录处理日志的logging模块使用；从目录，文件，命名结果中，获取循环条件进行循环。
我将这些有用的代码片段整理在一个Python脚本中了，并且测试可用。
脚本内容如下：

• #!/usr/bin/env python

• #_*_coding:utf8_*_

• #常用日期和时间

• import datetime,time

• today = datetime.date.today()

• yesterday = datetime.date.today() - datetime.timedelta(days=1)

• tomorrow = datetime.date.today() + datetime.timedelta(days=1)

• Today_nyr = int(datetime.datetime.strftime(today, '%Y%m%d'))

• Yesterday_nyr = int(datetime.datetime.strftime(yesterday, '%Y%m%d'))

• Tomorrow_nyr = int(datetime.datetime.strftime(tomorrow ,'%Y%m%d'))

• time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))

• print "now time is {time}".format(time=time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())))

• print "normal type , today is {today} , yesterday is {yesterday} , tomorrow is {tommorrow} .".format(today=today,yesterday=yesterday,tommorrow=tomorrow)

• print "nyr style , today is {today} , yesterday is {yesterday} , tommrrow is {tommorrow} .".format(today=Today_nyr,yesterday=Yesterday_nyr,tommorrow=Tomorrow_nyr)

• #logging.info("now time is {time}".format(time=time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))))

• #logging.info("normal type , today is {today} , yesterday is {yesterday} , tomorrow is {tommorrow} .".format(today=today,yesterday=yesterday,tommorrow=tomorrow))

• #logging.info("nyr style , today is {today} , yesterday is {yesterday} , tommrrow is {tommorrow} .".format(today=Today_nyr,yesterday=Yesterday_nyr,tommorrow=Tomorrow_nyr))

• ###程序日志模块logging使用

• import logging

• import os

• THISFILEPATH = os.path.dirname(os.path.realpath(__file__))

• logfile = '{path}/python_test_file.log'.format(path=THISFILEPATH)

• logging.basicConfig(level=logging.DEBUG,

•                     format='%(asctime)s - %(filename)s - [line:%(lineno)d] %(levelname)s: %(message)s',

•                     datefmt='%Y-%m-%d %H:%M:%S %p',

•                     filename=logfile,

•                     #level=10,

•                     filemode='a')

• logging.info("This is a info.\n")

• logging.warn("This is a warning.\n")

• logging.error("This is a error.\n")

• #logging.log("This is a log. \n\n")

• logging.debug("This is a debug. \n\n")

• logging.critical("This is a critical \n\n\n")

• logging.info("now time is {time}".format(time=time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))))

• logging.info("normal type , today is {today} , yesterday is {yesterday} , tomorrow is {tommorrow} .".format(today=today,yesterday=yesterday,tommorrow=tomorrow))

• logging.info("nyr style , today is {today} , yesterday is {yesterday} , tommrrow is {tommorrow} .".format(today=Today_nyr,yesterday=Yesterday_nyr,tommorrow=Tomorrow_nyr))

• ###从一个目录中，取出所有文件名进行循环

• from subprocess import call

• File_Dir = "/tmp"

• File_List = os.listdir(File_Dir)

• for f in File_List:

•     if( f[0] == '.' ):

•         continue

•     else:

•         logging.info("{filename}".format(filename=f))

• ###读取一个文件的多行，进行循环

• #文件读取方法一：

• file = open("/tmp/3.txt")

• while 1:

•     line = file.readline()

•     if not line:

•         break

•     logging.info("this line is :{line}".format(line=line))

• #文件读取方法二：

• import fileinput

• for line in fileinput.input("/tmp/3.txt"):

•     logging.info("this line is :{line}  .".format(line=line))

• #文件读取方法三：

• file = open("/tmp/3.txt")

• for line in file:

•     logging.info("this line is :{line}  .".format(line=line))

• ###获取一个shell命令执行结果，进行循环

• #获取命令方法一：

• import subprocess

• shell_cmd = "df -h | awk '{print $1}'"

• p = subprocess.Popen("{cmd}".format(cmd=shell_cmd), shell=True, stdout=subprocess.PIPE)

• out = p.stdout.readlines()

• for line in out:

•     print line.strip()

•     logging.info(" file system is :{line}  .".format(line=line.strip()))

• #获取命令方法二：

• for line in subprocess.Popen("df -h | awk '{print $1}'",shell=True,stdout=subprocess.PIPE).stdout.readlines():

•     print line.strip()

•     logging.info(" file system is :{line}  .".format(line=line.strip()))

      上面的脚本，可使用 python 3.py 直接执行。
       脚本执行结果如下：

• 2017-03-02 16:48:43 PM - 3.py - [line:38] INFO: This is a info.

• 2017-03-02 16:48:43 PM - 3.py - [line:39] WARNING: This is a warning.

• 2017-03-02 16:48:43 PM - 3.py - [line:40] ERROR: This is a error.

• 2017-03-02 16:48:43 PM - 3.py - [line:42] DEBUG: This is a debug.

• 2017-03-02 16:48:43 PM - 3.py - [line:43] CRITICAL: This is a critical

• 2017-03-02 16:48:43 PM - 3.py - [line:46] INFO: now time is 2017-03-02 16:48:43

• 2017-03-02 16:48:43 PM - 3.py - [line:47] INFO: normal type , today is 2017-03-02 , yesterday is 2017-03-01 , tomorrow is 2017-03-03 .

• 2017-03-02 16:48:43 PM - 3.py - [line:48] INFO: nyr style , today is 20170302 , yesterday is 20170301 , tommrrow is 20170303 .

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: 40001501_20170302.csv

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: proc_cpu_result

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: qaucli_022317-18_15_41.log

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: sfcbHttpSocket

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: 1.py

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: sfcbLocalSocket

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: 2.txt

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: null

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: 3.txt

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: 3.py

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: hsperfdata_root

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: updatehbaconf.sh.log

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: proc_cpu_detail.txt

• 2017-03-02 16:48:43 PM - 3.py - [line:60] INFO: python_test_file.log

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :1

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :2

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :3

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :4

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :5

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :6

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :7

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :8

• 2017-03-02 16:48:43 PM - 3.py - [line:69] INFO: this line is :9

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :1

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :2

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :3

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :4

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :5

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :6

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :7

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :8

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:74] INFO: this line is :9

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :1

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :2

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :3

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :4

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :5

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :6

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :7

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :8

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:79] INFO: this line is :9

•   .

• 2017-03-02 16:48:43 PM - 3.py - [line:90] INFO: file system is :Filesystem .

• 2017-03-02 16:48:43 PM - 3.py - [line:90] INFO: file system is :/dev/sda2 .

• 2017-03-02 16:48:43 PM - 3.py - [line:90] INFO: file system is :tmpfs .

• 2017-03-02 16:48:43 PM - 3.py - [line:90] INFO: file system is :/dev/sda1 .

• 2017-03-02 16:48:43 PM - 3.py - [line:90] INFO: file system is :/dev/sda5 .

• 2017-03-02 16:48:43 PM - 3.py - [line:96] INFO: file system is :Filesystem .

• 2017-03-02 16:48:43 PM - 3.py - [line:96] INFO: file system is :/dev/sda2 .

• 2017-03-02 16:48:43 PM - 3.py - [line:96] INFO: file system is :tmpfs .

• 2017-03-02 16:48:43 PM - 3.py - [line:96] INFO: file system is :/dev/sda1 .

• 2017-03-02 16:48:43 PM - 3.py - [line:96] INFO: file system is :/dev/sda5 .

关于常用python日期、日志、获取内容循环的代码片段是什么就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。