Parsing XML with DOM APIs in Python
The Document Object Model (DOM) is a programming interface for HTML and XML(Extensible markup language) documents. It defines the logical structure of documents and the way a document is accessed and manipulated.
Parsing XML with DOM APIs in python is pretty simple. For the purpose of example we will create a sample XML document (sample.xml) as below:
<?xml version="1.0"?><company> <name>GeeksForGeeks Company</name> <staff id="1"> <name>Amar Pandey</name> <salary>8.5 LPA</salary> </staff> <staff id="2"> <name>Akbhar Khan</name> <salary>6.5 LPA</salary> </staff> <staff id="3"> <name>Anthony Walter</name> <salary>3.2 LPA</salary> </staff></company> |
Now, let’s parse the above XML using python. The below code demonstrates the process,
from xml.dom import minidom doc = minidom.parse("sample.xml") # doc.getElementsByTagName returns the NodeListname = doc.getElementsByTagName("name")[0]print(name.firstChild.data) staffs = doc.getElementsByTagName("staff")for staff in staffs: staff_id = staff.getAttribute("id") name = staff.getElementsByTagName("name")[0] salary = staff.getElementsByTagName("salary")[0] print("id:% s, name:% s, salary:% s" % (staff_id, name.firstChild.data, salary.firstChild.data)) |
Output:
GeeksForGeeks Company id:1, name: Amar Pandey, salary:8.5 LPA id:2, name: Akbar Khan, salary:6.5 LPA id:3, name: Anthony Walter, salary:3.2 LPA
The same can also be done using a user-defined function as shown in the code below:
from xml.dom import minidom doc = minidom.parse("sample.xml") # user-defined functiondef getNodeText(node): nodelist = node.childNodes result = [] for node in nodelist: if node.nodeType == node.TEXT_NODE: result.append(node.data) return ''.join(result) name = doc.getElementsByTagName("name")[0]print("Company Name : % s \n" % getNodeText(name)) staffs = doc.getElementsByTagName("staff")for staff in staffs: staff_id = staff.getAttribute("id") name = staff.getElementsByTagName("name")[0] salary = staff.getElementsByTagName("salary")[0] print("id:% s, name:% s, salary:% s" % (staff_id, getNodeText(name), getNodeText(salary))) |
Output:
Company Name : GeeksForGeeks Company id:1, name:Amar Pandey, salary:8.5 LPA id:2, name:Akbhar Khan, salary:6.5 LPA id:3, name:Anthony Walter, salary:3.2 LPA
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