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element selector that matches all f elements that are descendants of the e element, separated by a space between E and F#nav li {display:inline;} li a {font-weight:bold;}E > Fchild element Selector, matching all elements of e element F div > Strong {color: #f00;}E + FAdjacent element selector, matching all sibling elements immediately following the E element fp + P {color: #f00;}Note Nested rules:Block-level elements can contain inline elements or some block-level elements, but inline elements

/bin/env Python3 #coding: Utf-8 Import Smtplib From Email.mime.multipart import Mimemultipart From Email.mime.text import Mimetext From Email.mime.image import Mimeimage Sender = ' * * * Receiver = ' * * * Subject = ' Python email test ' SmtpServer = ' smtp.163.com ' Username = ' * * * Password = ' * * * Msgroot = Mimemultipart (' related ') msgroot[' Subject ' = ' test message ' #构造附件 ATT = mimetext (open ('

instance to the Attributeimpl abstract class that the Attributeimpl instance corresponds to. The purpose of the two mapping relationship is to ensure that there is only one Attributeimpl instance for each attribute and Attributeimpl in the Attributesource instance, in other words, When an instance of an object is obtained with a specific attribute or a specific attributeimpl, the instance is not created each time, but is first created, and then only the previously established. Below to analyze

Email.mime.image import MimeimageSender = ' * * * 'Receiver = ' * * * 'Subject = ' Python email test 'SmtpServer = ' smtp.163.com 'Username = ' * * * 'Password = ' * * * 'Msgroot = Mimemultipart (' related ')msgroot[' Subject ' = ' test message '#构造附件ATT = mimetext (open (' h:\\python\\1.jpg ', ' RB '). Read (), ' base64 ', ' Utf-8 ')att["Content-type"] = ' application/octet-stream '

Main topic:There's an agent who's going to run a mission, he's going to meet up to 15 targets and the agents must kill them all. When he kills a target, he can use the target weapon to kill the other person. So he had to have a sequence of killings that allowed him to shoot the least number of times. Now give you a table that represents how much damage each weapon can inflict on each target. And you know the amount of blood for each target. When the target's blood volume is less than or equal to

Verify your membership status Getusertype () ==10) { echo "total Administrator"; } else if ($cuserLogin->getusertype () ==5) { echo "channel Editor"; } ? > Querying and displaying content Setquery ("Select * from ' #@__arcatt ' ORDER by SortID ASC"); $dsql->execute (); while ($trow = $dsql->getobject ()) {

") norepeat scroll 20px 20px;URL ("Path to Picture 3") norepeat scroll 30px 30px;Five. String matching:CSS3 String Matching selector:1. e:[att^=value] The attribute value of the Att property that matches element e is first the E element of valueExample: p:[class^= "a"]The first element p that represents the property value of the selected class property, "a" (for example, "a" for Class= "abc")2.e:[

= Mimemultipart (' related ')msgroot[' Subject ' = ' test message 'Msgtext = Mimetext (' Msgroot.attach (Msgtext)fp = open (' h:\\python\\1.jpg ', ' RB ')Msgimage = Mimeimage (Fp.read ())Fp.close ()Msgimage.add_header (' Content-id ', ' Msgroot.attach (Msgimage)SMTP = Smtplib. SMTP ()Smtp.connect (' smtp.163.com ')Smtp.login (username, password)Smtp.sendmail (sender, receiver, msgroot.as_string ())Smtp.quit ()Mail with Attachments#!/usr/bin/env Python3#coding: Utf-8Import SmtplibFrom Email.mime

! = ": For att in Atts.split (', '): Os.path.isfile (att) name = OS.PA Th.basename (att) att = mimetext (open (ATT). Read (), ' base64 ', ' Utf-8 ') att["content-type"] = ' applicat Ion/octet-stream ' #将编码方式为utf-8 name, transcodi

attribute that contain "class". Multiple elements in a document can have the same class name, and a single element can have more than one class name (written in the form of a space separating multiple class names). demo{ width:100px; height:100px; background:red;}4:e(element), tag Selector, matches all elements that use the e tag.span{ color:red; Background:pink; Font-style:20px;}Two. Multi-element combination selector:5:e,f, multi-element selector, matches all E and F element