jpuyy的网志

Tag: snippet

  • python获取昨天日期时间戳

    snippet

    import datetime
yesterday = datetime.datetime.now() - datetime.timedelta(days=1)
yesterday_formatted = yesterday.strftime("%Y-%m-%d")

    python 生成时间戳

    import time
now = int(time.time())

  • python遍历dictionary

    如代码

    #!/usr/bin/env python
#-*- coding:utf-8 -*-
dict={"a":"apple","b":"banana","o":"orange"}
print "##########dict######################"
for i in dict:
    print "dict[%s]=" % i,dict[i]
print "###########items#####################"
for (k,v) in dict.items():
    print "dict[%s]=" % k,v
print "###########iteritems#################"
for k,v in dict.iteritems():
    print "dict[%s]=" % k,v
print "###########iterkeys,itervalues#######"
for k,v in zip(dict.iterkeys(),dict.itervalues()):
    print "dict[%s]=" % k,v

  • python any判断一个对象是否为空

    any判断dict,list,tuple是不是为空

    >>> eth = {“eth0″:”192.168.1.1”}

    >>> any(eth)

    True

    >>> eth = {}

    >>> any(eth)

    False

  • python获取某目录下的所有文件和子目录-os.listdir

    有时候需要获取某目录下的所有文件和子目录，从stackoverflow搜到了一段代码，需要时可以使用。

    #!/usr/bin/python

import os, sys

# Open a file
path = "/var/www/html/"
dirs = os.listdir(path)

# This would print all the files and directories
for file in dirs:
   print file