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常用python日期、日志、獲取內(nèi)容循環(huán)的代碼片段是什么

這篇文章將為大家詳細(xì)講解有關(guān)常用python日期、日志、獲取內(nèi)容循環(huán)的代碼片段是什么，文章內(nèi)容質(zhì)量較高，因此小編分享給大家做個(gè)參考，希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。

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近段時(shí)間對(duì)shell腳本和python進(jìn)行了梳理，將一些腳本中常用的內(nèi)容，考慮多種方法整理出來，形成有用的代碼片段，這樣就可以在需要的時(shí)候直接使用，也可以用于備忘和思考。
本次整理的代碼片段有： python中日期、時(shí)間常用獲取方法； 記錄處理日志的logging模塊使用；從目錄，文件，命名結(jié)果中，獲取循環(huán)條件進(jìn)行循環(huán)。
我將這些有用的代碼片段整理在一個(gè)Python腳本中了，并且測(cè)試可用。
腳本內(nèi)容如下：

  • #!/usr/bin/env python

  • #_*_coding:utf8_*_

  • #常用日期和時(shí)間

  • 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))

  • ###程序日志模塊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))

  • ###從一個(gè)目錄中，取出所有文件名進(jìn)行循環(huán)

  • 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))

  • ###讀取一個(gè)文件的多行，進(jìn)行循環(huán)

  • #文件讀取方法一：

  • file = open("/tmp/3.txt")

  • while 1:

  •     line = file.readline()

  •     if not line:

  •         break

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

  • #文件讀取方法二：

  • import fileinput

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

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

  • #文件讀取方法三：

  • file = open("/tmp/3.txt")

  • for line in file:

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

  • ###獲取一個(gè)shell命令執(zhí)行結(jié)果，進(jìn)行循環(huán)

  • #獲取命令方法一：

  • 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()))

  • #獲取命令方法二：

  • 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()))


      上面的腳本，可使用 python 3.py 直接執(zhí)行。
       腳本執(zhí)行結(jié)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 .

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