× Python Introduction What is Python Python Features Python History Python Applications Python Install Python Path Python Example Execute Python Keywords Constant Variable Statements & Comments Python I/O and Import Operators UnaryBinaryTernary Unary Operators Unary Minus Binary Operators Arithmetic Operators Assignment Operators Relational Operators Logicaloperators Bitwise Operator Ternary Operators Control Statements in Python conditonal Statements IF if else Else If Nested if Switch For loop Nested For Loop While Loop Nested while Loop Unconditonal Statemets Continue Break Pass FUNCTIONS Python Function Function Argument Python Recursion Anonymous Function Python Modules NATIVE DATATYPES Python List Python Numbers Python Tuple Python String Python Set Python Dictionary OOPS PRINCIPALS Encapsulation Class Variable Method Object Or Instance CreationMethod Calling OOPS Syntax And Explanation DATA ABSTRACTION Constructor Inheritance 1.Single or simple Inheritance 2.Multilevel Inheritance 3.Hierarchical Inheritance 4.Multiple Inheritance 5.Hybrid Inheritance Operator Overloading File Operation Python Directory Python Exception Python - Multithreading Python - Database Access Python - CGI Python - Reg Exp Python - Date Python - XML Processing Python - GUI
  • iconPython Online Training In Andhra Pradesh and Telangana
  • icon9010519704

Opening Hours :7AM to 9PM

Python XML

What is XML?
XML stands for "Extensible Markup Language". It is mainly used in webpages, where the data has a specific structure and is understood dynamically by the XML framework.

XML creates a tree-like structure that is easy to interpret and supports a hierarchy. Whenever a page follows XML, it can be called an XML document.
XML documents have sections, called elements, defined by a beginning and an ending tag. A tag is a markup construct that begins with < and ends with > . The characters between the start-tag and end-tag, if there are any, are the element's content. Elements can contain markup, including other elements, which are called "child elements".
The largest, top-level element is called the root, which contains all other elements.

Attributes are name–value pair that exist within a start-tag or empty-element tag. An XML attribute can only have a single value and each attribute can appear at most once on each element. To understand this a little bit better, take a look at the following (shortened) XML file:
<collection shelf="New Arrivals">
<movie title="Enemy Behind">
   <type>War, Thriller</type>
   <description>Talk about a US-Japan war</description>
<movie title="Transformers">
   <type>Anime, Science Fiction</type>
   <description>A schientific fiction</description>
   <movie title="Trigun">
   <type>Anime, Action</type>
   <description>Vash the Stampede!</description>
<movie title="Ishtar">
   <description>Viewable boredom</description>

From what you have read above, you see that <collection> is the single root element: it contains all the other elements, such as <genre>, or <movie>, which are the child elements or subelements. As you can see, these elements are nested.
Note that these child elements can also act as parents and contain their own child elements, which are then called "sub-child elements".
You'll see that, for example, the element contains a couple of "attributes", such as favorite title that give even more information!

Python XML



import xml.sax

class MovieHandler( xml.sax.ContentHandler ):
   def __init__(self):
      self.CurrentData = ""
      self.type = ""
      self.format = ""
      self.year = ""
      self.rating = ""
      self.stars = ""
      self.description = ""

   # Call when an element starts
   def startElement(self, tag, attributes):
      self.CurrentData = tag
      if tag == "movie":
         print ("*****Movie*****")
         title = attributes["title"]
         print ("Title:", title)

   # Call when an elements ends
   def endElement(self, tag):
      if self.CurrentData == "type":
         print ("Type:", self.type)
      elif self.CurrentData == "format":
         print ("Format:", self.format)
      elif self.CurrentData == "year":
         print ("Year:", self.year)
      elif self.CurrentData == "rating":
         print ("Rating:", self.rating)
      elif self.CurrentData == "stars":
         print ("Stars:", self.stars)
      elif self.CurrentData == "description":
         print ("Description:", self.description)
      self.CurrentData = ""

   # Call when a character is read
   def characters(self, content):
      if self.CurrentData == "type":
         self.type = content
      elif self.CurrentData == "format":
         self.format = content
      elif self.CurrentData == "year":
         self.year = content
      elif self.CurrentData == "rating":
         self.rating = content
      elif self.CurrentData == "stars":
         self.stars = content
      elif self.CurrentData == "description":
         self.description = content
if ( __name__ == "__main__"):
   # create an XMLReader
   parser = xml.sax.make_parser()
   # turn off namepsaces
   parser.setFeature(xml.sax.handler.feature_namespaces, 0)

   # override the default ContextHandler
   Handler = MovieHandler()
   parser.setContentHandler( Handler )


Title: Enemy Behind
Type: War, Thriller
Format: DVD
Year: 2003
Rating: PG
Stars: 10
Description: Talk about a US-Japan war
Title: Transformers
Type: Anime, Science Fiction
Format: DVD
Year: 1989
Rating: R
Stars: 8
Description: A schientific fiction
Title: Trigun
Type: Anime, Action
Format: DVD
Rating: PG
Stars: 10
Description: Vash the Stampede!
Title: Ishtar
Type: Comedy
Format: VHS
Rating: PG
Stars: 2
Description: Viewable boredom