how to read data from xml file

[Raj]

# -*- coding: utf-8 -*-
"""
Created on Fri Apr 13 20:33:17 2018

@author: user
"""

#from xml.dom import minidom
#
#doc = minidom.parse("D:\Mekala_Backupdata\PythonCodes\input.xml")

 
#import xml.etree.cElementTree as ET
#tree = ET.ElementTree('D:\Mekala_Backupdata\PythonCodes\input.xml')
#root = tree.getroot()
#for books in root:
#    if (books.tag=='book'):
#        print books.get('id')
#        for attr in books:
#            if (attr.tag=='author'):
#                print (attr.text)
                
import xml.etree.cElementTree as ET
source_file = 'D:\Mekala_Backupdata\PythonCodes\input.xml'
tree = ET.parse(source_file)
root = tree.getroot()
for books in root:
    if (books.tag=='book'):
        print(books.get('id'))
        for attr in books:
            if (attr.tag=='author' or attr.tag=='title' or attr.tag=='price'):
                print (attr.text)

the code is workig,
But in tilte part, I only want first part before ":"

for example: in my above xml file the last title is:
Visual Studio 7: A Comprehensive Guide
I only want upto "Visual Studio 7" (or if I want to take the part after ":" i.e A Comprehensive Guide)

kinldy help how to do this