Python third day file operation exercises

The file reads as follows: Take Tomcat's Server.xml file as an example

1. Find out how many <Listener> nodes are in the server and print them out

2. At the end of the document I add a

<Service>

            Unpackwars= "false" autodeploy= "false" >

</service>, ask the Service to be inside the server

3. Modify, speak of the added service inside the

Unpackwars= "false" autodeploy= "false" to
Unpackwars= "true" autodeploy= "true"

4. Delete the portion of the content that you added

<?XML version= ' 1.0 ' encoding= ' utf-8 '?><ServerPort= "8085"shutdown= "SHUTDOWN">   <ListenerClassName= "Org.apache.catalina.core.AprLifecycleListener"Sslengine= "On" />  <!--Initialize Jasper prior to WebApps is loaded. Documentation At/docs/jasper-howto.html -  <ListenerClassName= "Org.apache.catalina.core.JasperListener" />  <!--Prevent memory leaks due to use of particular Java/javax APIs -  <ListenerClassName= "Org.apache.catalina.core.JreMemoryLeakPreventionListener" />  <ListenerClassName= "Org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />  <ListenerClassName= "Org.apache.catalina.core.ThreadLocalLeakPreventionListener" />  <globalnamingresources>      <Resourcename= "Userdatabase"Auth= "Container"type= "Org.apache.catalina.UserDatabase"Description= "User database that can be updated and saved"Factory= "Org.apache.catalina.users.MemoryUserDatabaseFactory"Pathname= "Conf/tomcat-users.xml" />  </globalnamingresources>  <Servicename= "Catalina">      <ConnectorPort= "8099"Protocol= "http/1.1"ConnectionTimeout= "20000"Redirectport= "8443" />    <ConnectorPort= "8089"Protocol= "ajp/1.3"Redirectport= "8443" />    <Enginename= "Catalina"Defaulthost= "localhost">      <RealmClassName= "Org.apache.catalina.realm.LockOutRealm">               <RealmClassName= "Org.apache.catalina.realm.UserDatabaseRealm"resourcename= "Userdatabase"/>      </Realm>      <Hostname= "localhost"AppBase= "WebApps"Unpackwars= "true"Autodeploy= "true">                       <ValveClassName= "Org.apache.catalina.valves.AccessLogValve"Directory= "Logs"prefix= "Localhost_access_log."suffix= ". txt"pattern= "%h%l%u%t &quot;%r&quot;%s%b"resolvehosts= "false"/>      </Host>    </Engine>  </Service></Server>

Python third day file operation exercises