学习笔记:python

【开发环境】:

Python 3.3   http://rj.baidu.com/soft/detail/25283.html   大小:20.2M   版本:3.3.5150  位数:64   更新日期:2014-03-14

在本机运行*.py文件: c:\Python33\python zz.py

Python 3.4.3  http://rj.baidu.com/soft/detail/25283.html   大小:23.7M   版本:3.4.16490   位数:64   更新日期:2015-07-24

PyCharm4.5.4  http://www.jetbrains.com/pycharm/download/     下载:(左侧完全版)

 

【第三方库】

http://www.crummy.com/software/BeautifulSoup/bs4/download/   Beautifulsoup4.4.1   2015-11-1

http://www.crummy.com/software/BeautifulSoup/bs4/doc.zh/   Beautiful Soup 4.2.0 文档  2015-10-20

 

【手册】

http://docs.pythontab.com/   在线手册

 

【安装】

http://www.cnblogs.com/yuanzm/p/4089856.html   windows下面安装Python和pip终极教程  2015-10-30

  windows下添加python的路径:我的电脑 -> 属性 -> 点击高级系统设置 ->  高级 -> 点击“环境变量”,添加:
  变量填写: PATH
  变量值填写:C:\Python34
  PIP:
  https://pypi.python.org/pypi/pip#downloads  下载解包 pip-7.1.2.tar.gz  ,进入解压缩目录,输入:python setup.py install

  在windows中,再添加系统变量:
  变量填写: PATH
  变量值填写: C:\Python34;C:\Python34\Scripts;

  安装 beautifulsoup:

  打开cmd,进入目录:c:\beautifulsoup
  输入:python setup.py build
  输入:python setup.py install
  想知道安装了哪些包,可以用 pip list 查看

 

 

http://jingyan.baidu.com/article/a378c9608fbf7db3282830f6.html editplus配置python开发环境

http://blog.jobbole.com/72306/   python 开源框架

 

http://www.oschina.net/news/57468/best-python-ide-for-developers   IDE

http://www.oschina.net/news/43167/130-essential-vim-commands   VIM 命令

http://www.cnblogs.com/elaron/p/3213333.html   网络爬虫(需要再看)  2015-11-1

http://blog.92fenxiang.com/articles/1427366991   爬虫2

http://www.169it.com/article/10082287536227590022.html   python下xml解析库lxml最新版下载安装以及代码示例

http://blog.csdn.net/cnmilan/article/details/9142561   Python 的文件IO相关操作说明

http://www.1point3acres.com/bbs/thread-83337-1-1.html   手把手教你用python抓网页数据(还未试过)   2015-10-20

http://cuiqingcai.com/1319.html      Python爬虫入门八之Beautiful Soup的用法(未看 可参考)  2015-10-20

http://www.xprogrammer.com/1258.html   python编码问题总结

http://www.vaikan.com/improving-your-python-productivity/   Python高效编程技巧  2015-10-27

http://www.2cto.com/kf/201401/276088.html  时间(参考)

http://andrewliu.in/2015/11/14/Python%E5%A5%87%E6%8A%80%E6%B7%AB%E5%B7%A7/?hmsr=toutiao.io&utm_medium=toutiao.io&utm_source=toutiao.io   几个技巧

http://bigdatadigest.baijia.baidu.com/article/259542  抢票  2015-12-11

http://andrewliu.in/2015/11/14/Python奇技淫巧/?hmsr=toutiao.io   Python奇技淫巧

http://codingpy.com/article/getting-started-with-pycharm-video-tutorials/  PyCharm官方推出最新入门视频教程  2016-1-21

 

 

 

 

 

 

 

练习用的代码段

中文:

# -*- coding: utf-8 -*-
#coding=utf-8

存为utf-8格式的文件:

# -*- coding: utf-8 -*-
import codecs;
f = codecs.open('d:/test111.txt', 'w', 'utf-8');
f.write('存为utf-8格式的文件..............')
f.close();

 保存文件:

#保存文件
string = 'ssssssss'
#string = input('please input string:')
with open('d:/test223.txt', 'a') as file:
    file.write(string)
file.close()

 输出多行文本:2015-12-31

print r'''"To be, or not to be": that is the question.
Whether it's nobler in the mind to suffer.'''
# 结果是两行文字

 

 

输入两个数字,排序:

#输入两个数字,排序
x = int(input('please input x:'))  
y = int(input('please input y:'))  
if x > y :  
    x, y = y, x 
print(x,y)

 循环:

#循环
for i in range(2,10):
    if i%2==0:
        print ("偶数",i)
    else:
        print ("奇数",i)

 int与string之间的转化:

int('12')       #10进制string --> int
int('ff', 16)   #16进制string --> int
str(18)         #int --> 10进制string
hex(18)         #int --> 16进制string

 

当前时间:

import time
now=time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(int(time.time())-24*60*60))
print(now)

 

时间戳转换为指定日期:

# -*- coding: utf-8 -*-
#时间戳转换为指定格式日期:
import time
#timeStamp = 1381419600
timeStamp = int(time.time())     #当前时间戳
timeArray = time.localtime(timeStamp)   #本地时间
formatTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)
print(formatTime)

import datetime
#获得当前时间
now = datetime.datetime.now()   #这是时间数组格式
formatTime = now.strftime("%Y-%m-%d %H:%M:%S")
print(formatTime)

将字符串的时间转为时间戳

#将字符串的时间转换为时间戳
import time
now = "2015-11-1 23:30:00"
timeArray = time.strptime(now, "%Y-%m-%d %H:%M:%S")
timeStamp = int(time.mktime(timeArray))
print(timeStamp)

#字符串格式更改: 如now = "2015-11-01 23:30:00",想改为 now = "2015年11月01日  23:40:00"
#方法:先转换为时间数组,然后转换为其他格式
import time
now = "2015-11-01 23:30:00"
timeArray = time.strptime(now,"%Y-%m-%d %H:%M:%S")
formatTime = time.strftime("%Y/%m/%d %H:%M:%S", timeArray)
print(formatTime)

计算3天以前:

#计算3天以前
import time
import datetime
threeDayAgo = (datetime.datetime.now() - datetime.timedelta(days = 3))
timeStamp = int(time.mktime(threeDayAgo.timetuple()))
formatTime = threeDayAgo.strftime("%Y-%m-%d %H:%M:%S")
print(formatTime)

 

 

 

扒取页面并保存:

#扒取页面并保存
import urllib.request as request
url = "http://www.163.com/"
doc = request.urlopen(url).read()
with open('d:/test.txt','wb') as file:
    file.write(doc)
    file.close()

存成utf-8文件:

# -*- coding: utf-8 -*-
import codecs
for i in range(2,5):
    iii=str(i)     #数字转字符串
    doc = ('数值是: '+iii)
    if i%2==0:
        doc += (" 偶数")
    else:
        doc += (" 奇数")
    f = codecs.open('d:/test'+iii+'.txt', 'w', 'utf-8');
    f.write(doc)
    f.close()

 

 

..

 

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