Python2.7学习

网上很多代码都不适用于python3版本，所以还是转回版本2来学习了

install 安装模块特别简单

E:\01_SOFT\Python27\python  -m easy_install sunburnt

E:\01_SOFT\Python27\python  -m easy_install lxml

E:\01_SOFT\Python27\python  -m easy_install requests

Microsoft Visual C++ Compiler for Python 2.7 

http://www.microsoft.com/en-us/download/confirmation.aspx?id=44266





beautifulsoup4

cd E:\01_SOFT\beautifulsoup4-4.3.2\beautifulsoup4-4.3.2

python setup.py install





mongodb安装

http://blog.csdn.net/t_ells/article/details/50265889

E:\01_SOFT\mongodb\mongodb-win32-x86_64-2.2.0\bin\mongod --dbpath "E:\01_SOFT\mongodb\data"





pymongo

https://pypi.python.org/pypi/pymongo/

安装$ E:\01_SOFT\Python27\python  -m easy_install pymongo





download

https://www.python.org/downloads/release/python-352/





python实现简单爬虫功能

http://www.cnblogs.com/fnng/p/3576154.html





Python模拟百度登录实例详解

http://www.jb51.net/article/78406.htm





时间戳转换工具

http://tool.lu/timestamp





使用Python解析JSON数据的基本方法

http://www.jb51.net/article/73450.htm





Unicode编码转换

http://tool.chinaz.com/tools/unicode.aspx





Json在线解析

http://www.bejson.com/jsonviewernew/





软件下载

https://pan.baidu.com/share/home?uk=2466540631#category/type=0





Python爬虫入门六之Cookie的使用

http://cuiqingcai.com/968.html





Cookies and CookieJar 

https://bytes.com/topic/python/answers/802534-cookies-cookiejar





Python实战计划学习作业2-1

http://blog.csdn.net/python012/article/details/53344501





1.关于api-ms-win-crt-runtimel1-1-0.dll缺失的解决方案 

https://www.microsoft.com/zh-cn/download/confirmation.aspx?id=48145





2.can't use a string pattern on a bytes-like object 

imglist = re.findall(imgre,html.decode('GBK'))





3.inconsistent use of tabs and space in indentation

把tab替换成空格





4.UnicodeDecodeError:'gbk' codec can't decode byte 0xaf in position 197:illegal multibyte sequence

html.decode('utf-8')





5.Missing parentheses in call to 'print'

print x 

改成print(x)





6.IndentationError:expected an indented block错误解决 

print前面空格不同代表不同层次

对缩进非常敏感,有冒号的下一行往往要缩进，该缩进就缩进





7.Python EOL while scanning string literal问题解决方法

引号没有成对出现





8.Beautifulsoup BS4

https://pypi.python.org/pypi/beautifulsoup4/4.3.2





cd E:\01_SOFT\beautifulsoup4-4.3.2\beautifulsoup4-4.3.2

python setup.py install





soup = BeautifulSoup(open('index.html'))

print soup.prettify()





list = soup.findAll('a');

list = soup.findAll(name='a',href=re.compile(r"kw=")) ;

list = soup.findAll(name='a',attrs={'href':re.compile(r"kw="),'title':re.compile(r".")}) ;

9.保存网页，百度的不成功

import urllib

def cbk(a, b, c):  

'''回调函数 

@a: 已经下载的数据块 

@b: 数据块的大小 

@c: 远程文件的大小 

'''  

per = 100.0 * a * b / c  

if per > 100:  

per = 100  

print '%.2f%%' % per 

urllib.urlretrieve('http://www.cmfish.com/bbs/forum.php','D:\\06_Download\\py\\baidu1.html',cbk);





10.保存字符串

def save(filename, contents): 

  fh = open(filename, 'w') 

  fh.write(contents) 

  fh.close() 

save('D:\\06_Download\\py\\baidu.html', content) 





11.UnicodeEncodeError: ‘gbk‘ codec can‘t encode character u‘\xa9‘ in position 24051: illegal multibyte sequence

source_code.encode(‘GB18030‘)

not work!





12.TypeError: coercing to Unicode: need string or buffer, type found

??





13.'ascii' codec can't encode characters in position 4-7:ordinal not in range(128)

str('中文')???





14.invalid mode('w') or filename

文件路径错误

f = file("E:\json.txt",'w')

改成  

f = file("E:\\json.txt",'w')  





15. No JSON object could be decoded

expected string or buffe

pythod invalid file mode or filename

>将文件保存为不带BOM的UTF-8格式





import json

from pymongo import MongoClient

client = MongoClient('127.0.0.1', 27017)

db = client["Collections"]#数据库名

table=db['user']#表名

table.insert({'id':'1','name':'cnki'})

f = file("D:\\json.txt")  

j = json.loads(f.read()); 

table=db['jsontxt']#表名

courseId = table.save(j)





Python中解析Json文件出错：ValueError : No JSON object could be decoded –> Python中Json库不支持带BOM的UTF-8

http://www.crifan.com/fixed_problem_for_python_valueerror_no_json_object_could_be_decoded/





16.Non-ASCII character '\xe5' in file ……

原因：Python默认是以ASCII作为编码方式的，如果在自己的Python源码中包含了中文（或者其他非英语系的语言），此时即使你把自己编写的Python源文件以UTF-8格式保存了，但实际上，这依然是不行的。

需要在文件前面加

#coding=utf-8





17.unexpected unident

空格或tab键对齐