Python Interview Questions on HTML/XML in Python

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We have compiled most frequently asked Python Interview Questions which will help you with different expertise levels.

Python Interview Questions on HTML/XML in Python

Question 1:
What module is used to handle URLs?
Answer:
urlparse.

Question 2:
Illustrate parsing a URL into a tuple.
Answer:
Import urlparse
myTuple = urlparse.urlparse( “http://wivzv.example.com/mydirectory/ myfile.html”)

Question 3:
What modules does Python provide for opening and fetching data from URLs?
Answer:
urllib and urllib2.

Question 4:
What is the main difference between the urllib and urllib2 modules?
Answer:
The urllib2 module can accept a Request object, which allows the specification of headers.

Question 5:
Illustrate opening and printing a web-based URL.
Answer:
import urllib ,
myURL =urllib.urlopen(“http:/lwww.example.org/myfile.html”)
myBuffer = myURL.read( )
print myBuffer

Question 6:
How is the requested information retrieved?
Answer:
Using the .info( ) method on an open URL.

Question 7:
To process the contents of an HTML file, what module is used?
Answer:
HTMLParser.

Question 8:
How is the HTMLParser used?
Answer:
By subclassing the HTMLParser.HTMLParser class, and inserting processing for the tags of interest, instantiating it, then by calling the .feed method of the resulting object.

Question 9:
What modules are used to manage cookies?
Answer:
The urllib and cookielib modules.

Question 10:
Illustrate retrieving a cookies from a URL.
Answer:
Import urllib2
Import cookielib
myjar= cookielib.LWPCookieJar( )
myOpener = urllib2.build_opener(
urllib2.HTTPCookieProcessor(myJar))
urllib2. ins tall_opener( myOpener)
myRequest =urllib2. RequestC’http:!/www.example.org/”)
myHTML = urllib2.urlopen(my Request)
for cookie in enumerate(myjar)
print cookie

Question 11:
In managing XML documents, what is the module most often used?
Answer:
xml.dom Also, the minidom class within xml.dom

Question 12:
Illustrate opening an xml document.
Answer:
from xml.dom import minidom myTree = minidom.parse(‘myXML.xml’) print myTree.toxmlO

Question 13:
What tools are available to determine if an xml file is well formed?
Answer:
Using a try, except block, and attempting to parse the xml file through the generic parser available in xml.sax

Question 14:
How are xml element attributes accessed?
Answer:
Using the minidom parser, then the .getAttribute method on returned child nodes.

Question 15:
What method is used to determine if a child node includes a particular attribute?
Answer:
Using the .hasAttribute method which will return true if the attribute is defined.

Question 16:
What is the difference between the .toxml and .toprettyxml methods?
Answer:
The .toprettyxml method will indent the node contents appropriately.

Question 17:
What is expat module and what is it used for?
Answer:
The expat module is a non-validating XML parser. It is used to process XML very quickly, with minimal regard for the formal correctness of the XML being parsed.

Question 18:
What does the .dom stand for in the xml.dom module?
Answer:
Document Object Model.

Question 19:
What parsers are available for XML?
Answer:
Sax, expat, and minidom

Question 20:
Illustrate direct node access in an XML file.
Answer:
from xml.dom import minidom myXML = minidom.parse(”myXML.xml”)
myNodes = myXML.childNode s print childNodes[0].toprettyxml()