xml-parser.1.py

import os,sys
import string
from optparse import OptionParser
from lxml import etree
from io import StringIO

__version__="1.0"
__status__ = "Dev"

"""
This script will print(std out) some domains of a .xml file.
This script has three options, you can execute the script in three ways:
1. python xml-parser.1.py --version
This is the option that show you the program's version.
2. python xml-parser.1.py -h
This can show you some help information.
3. python xml-parser.1.py -i <filename.xml>
-i specifies input
This option will open the .xml file you input.
If the element tag is "book", it will output all the attributes of elements. 
If the element tag is "title", it will output the text of the elements.
Usage:
python xml-parser.1.py -i <filename.xml>
"""
###############################
def main():

        usage = "\n%prog  [options]"
        parser = OptionParser(usage,version="%prog " + __version__)
        parser.add_option("-i","--xmlFile",action="store",dest="xmlFile",help="Input xml file")

        (options,args) = parser.parse_args()
        for file in ([options.xmlFile]):
                if not (file):
                        parser.print_help()
                        sys.exit(0)

        xmlFile = options.xmlFile

	FR = open(xmlFile)
	xml = FR.read()
        FR.close()

	context =  etree.iterparse(StringIO(xml), events=("start", "end"))
	 
	for action, elem in context:
		if action == "start":
                        if elem.tag == "book":
                                print (elem.attrib["id"])
			elif elem.tag == "title":
                                print (elem.text)





if __name__ == '__main__':
        main()