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BeautifulSoup is a tool for parsing crawled content, and its find and Find_all methods are useful. And after parsing, it will form a tree structure, for the Web page form a similar to the JSON format of the Key-value, it is easier and more convenient for the content of the Web page operation. Download the library without much to say, using the python pip, directly inside the cmd execute pip install BeautifulSoup can First copy the document description, the code is copied over, as follows fromB
dormouse ' s story#Print the P tag in soup, but here's the first one you can find#print (SOUP.P)##Print the P tag class name in soup, but here's the first one you can find#Print (soup.p[' class '],type (Soup.p[' class '))#[' title '] #print the A tag in soup, but here's the first one you can find#print (SOUP.A)# " id= "Link1" >Elsie#Print all the A labels#Print (Soup.find_all (' a '))#[ " id= "Link1" >ELSIE# " id= "Link2" >LACIE##Print a id=link3 lab
There are a lot of LightScribeLabeler production software on Windows, such as SonicExpressLabeler, NeroCoverDesiner, SureThingCDLabeler, RoxioEasyMediaCreator (only NeroCoverDesigner), because Windows XP of VirtualBox cannot recognize its own Recorder, you cannot use many LightScribe Labeler production software on the NeroCoverD Windows platform, such as Sonic Express Labeler, Nero Cover Desiner, SureThing CD Labeler, and Roxio Easy Media Creator (only used Nero Cover Designer ), because Windows
Bdist_eggrunning egg_infowriting requirements to Beautifulsoup4.egg-info/requires.txt ...Under test[Email protected]:~/soft/python-source/beautifulsoup4-4.4.1$ Pythonpython2.7.8 (Default, Oct 20 2014, 15:05:19) [GCC4.9.1] on Linux2type" Help","Copyright","credits" or "License" forMore information.>>> fromBs4ImportBeautifulSoup>>>Introducing the BeautifulSoup package into the Python environment, as shown above, demonstrates success.See examples directly:#!/usr/bin/python#-*-Coding:utf-8-*-From
, a regular expression, a list, and True. See Example:Soup.find_all (text= "Elsie") # [u ' Elsie ']soup.find_all (text=["Tillie", "Elsie", "Lacie"]) # [u ' Elsie ', U ' Lacie ', U ' Tillie ']soup.find_all (text=re.compile ("Dormouse")) [u "the Dormouse ' s story", U "the Dormouse's story"]def Is_the_only_ String_within_a_tag (s): "" "Return True if this string was the only child of its parent tag." "
Sisters; and their names were and " id= "Link3" >Tillieand they lived at the bottom of a well."""#创建 Beautiful Soup ObjectsSoup=BeautifulSoup (HTML)#打开本地 HTML file to create an object#soup = beautifulsoup (open (' index.html '))#格式化输出 the contents of a Soup objectPrintSoup.prettify ()Operation Result: The Dormouse ' s story class="title"name="Dromouse"> The Dormouse ' s story class="Story">Once upon a time there were three Little sisters; and their names wereclass="Sister"href="Http:/
) = = 6Soup.find_all (Class_=has_six_characters)The class property of tag is a multivalued property. When searching for tags by CSS class name, you can search each CSS class name in tag individually:Css_soup = BeautifulSoup (' Css_soup.find_all ("P", class_= "strikeout")Css_soup.find_all ("P", class_= "body")You can also search for the class property exactly by CSS valuesCss_soup.find_all ("P", class_= "body strikeout")If the order of the CSS class name does not match the actual value of class,
See examples directly: Copy Code code as follows: #!/usr/bin/python #-*-Coding:utf-8-*- From BS4 import BeautifulSoup Html_doc = "" " And they lived at the bottom of a well.""" Soup = BeautifulSoup (Html_doc) Print Soup.title Print Soup.title.name Print soup.title.string Print SOUP.P Print Soup.a Print Soup.find_all (' a ') Print Soup.find (id= ' Link3 ') Print Soup.get_text () The results are: Copy Code code as follows: Title The Dormouse ' s story
Previously, RAID controllers and file systems had a 2TB limit. The limit on the controller, mainly refers to each LUN can not be greater than 2TB, and disk groups generally do not have this limit, the file system limit is mainly refers to each partition (partition) can not be greater than 2TB, but 32-bit Windows requires a physical disk can not be greater than
pressing ENTER, as shown in.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/6C/5A/wKiom1VHDhWBoKUmAAIWDQ0UuOU408.jpg "/>If you are installing a Windows 7 64-bit system, the menu shown may appear.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6C/5A/wKiom1VHDhbyQqHEAAFr1vd727Y525.jpg "/>It is important to note that depending on the size of the hard disk to select the corresponding startup items, if you want to install the system's hard disk capacity (including group raid) l
-level partition table. Yes, the primary partition that is used for two partitions is the "extended partition", and the two-level partition below It is the "logical Partition".about how to use the parted tool in Linux under the partition, here reprinted an article, explained very clearly. Original source: http://dngood.blog.51cto.com/446195/647702/A key wordlimitations of MBR and 2TBWhen using Fdisk to create a partition, we can only create a partition of 2T
system. The original EXT3 data structure is still retained, EXT4 action on new data, of course, the entire file system has thus obtained the EXT4 supported by the larger capacity.Upgrade from ext3 to EXT4:# CD/; Umount/dev/sda1# Tune2fs-o EXTENTS,UNINIT_BG,DIR_INDEX/DEV/SDA1Remember, you must scan with fsck after converting to EXT4, otherwise you cannot mount,-p the "auto fix" file system with the parameter description:# FSCK-PF/DEV/SDA1Mount the Ext4 file system:# mount-t ext4/dev/sda1/path/to
to obtain the properties of a label through the Get function: Soup=beautifulsoup (HTML, ' Html.parser ') pid = Soup.findall (' A ', {' class ': ' sister '}) for i-PID: Print i.get (' href ') #对每项使用get函数取得tag属性值 http://example.com/elsie http://example.com/lacie http:// Example.com/tillie The other labels are also available, and the output is the first matching object in the document, and the Find FindAll function is required if you want to searc
Outputer (): Def __init__ (self): self.datas=[] def collect_data ( Self,data): If data is None:return self.datas.append (data) def output (self): Fout =open (' output.html ', ' W ', encoding= ' utf-8 ') #创建html文件 fout.write (' Additional explanations for the beautifulsoup of the Web page parser are as follows: Import re from BS4 import beautifulsoup html_doc = "" The results were as follows: Get all links with a Http://example.com/elsie Elsie a http://example.com/
The difference between FAT32 and NTFS Prior to the introduction of the FAT32 file system, the file system used by the PC is usually FAT16. The FAT16 file system is used in systems such as Ms-dos,win 95. Under Win 9X, the maximum number of partitions supported by FAT16 is 2GB. We know that computers store information in areas called "clusters" on your hard disk. The smaller the cluster you use, the more efficient it is to save information. In the case of FAT16, the bigger the cluster, the lowe
automatically created in the Sesparse format instead of Vmfssparse (incremental).Extending basic flat disks in Vmfssparse or sesparse format is not supported.The Vmfssparse format does not support 2 TB or more space.The Vmfssparse and sesparse formats cannot coexist in the same VMDK. InVirtual Machines, the two types of snapshots can coexist, but cannot be in the same disk chain. For example, if you take a snapshot of a virtual machine that is connected to two virtual disks, one disk is less th
the performance of MBR partitioned tables, making them less able to handle large-capacity hard drives. 1, the total number of primary partitions, not more than 4. This means that a hard drive can be divided into 4 primary partitions. 2. If the extended partition is divided, then a hard disk can only have one extended partition, and the number of partitions between the primary partition and the extended partition cannot exceed 4, that is, a hard disk can be divided into 3 primary partitions an
: fromBs4ImportBeautifulSoupImportre Html_doc="""""" Print('get all the links') Links= Soup.find_all ('a') forLinkinchLinks:Print(link.name,link['href'],link.get_text ())Print('get a link to Lacie') Link_node= Soup.find ('a', href='Http://example.com/lacie') Print(link_node.name,link_node['href'],link_node.get_text ())Print('regular Match') Link_node= Soup.find ('a', Hre
bolddel tag[' class ']del tag[' id ']tag#extremely boldtag[' class ']# Keyerror: ' Class ' Print (Tag.get (' class ')) # None You can also find DOM elements in a random way, such as the following example 1. Build a document Html_doc = "" The Dormouse ' s storythe dormouse ' s storyonce upon a time there were three Little sisters; And their names Wereelsie,lacie Andtillie;and they lived at the bottom of a well .... "" "from BS4 import Beautifulsoups
Example:HTML file:Html_doc = "" "dormouse ' s story"""Code:From BS4 import BeautifulSoupSoup = BeautifulSoup (Html_doc)Next you can start using a variety of featuresSoup. X (x is any label, returns the entire label, including the label's attributes, contents, etc.)such as: Soup.title# Soup.p# dormouse ' s storySOUP.A (Note: Only the first result is returned)# Soup.find_all (' a ') (Find_all can return all)# [# # find can also be found by attributesSoup.find (id= "Link3")# to fetch a property of
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