from lxml import etree
import gzip
import sys

if len(sys.argv) > 2:
	tickers = [ticker.strip() for ticker in sys.argv[2:]]
	data_file = sys.argv[1]
else:
    print ("\nProvide two positional parameters:")
    print ("   File name as the first.")
    print ("   Specify one or more tickers as second and onward separated by a space.")
    exit()
    
with gzip.open(data_file, "rb") as f:
	context = etree.iterparse(f, tag='{http://www.gnucash.org/XML/gnc}commodity')
  
	for event, elem in context:

		symbol = elem[1].text
		namespace = elem[0].text
		elem.clear()
    
		if any(symbol.lower() == ticker.lower() for ticker in tickers):
			print ("{}:{}".format(symbol, namespace))