The script checks if the command entered is in the correct format. If true, then getvalue() function is called and the NASDAQ symbol is passed to it. The getvalue() function fetches the share value from the url using urlopen() function of module urllib2 and stores it in a file. It the passes the file to printvalue() function which prints the share value.
#!/usr/bin/env python
import sys
import urllib2
def getvalue(symbol):
"""
This function gets the latest share value of the inputted NASDAQ symbol.
:arg symbol: NASDAQ symbol of a company.
"""
url = 'http://download.finance.yahoo.com/d/quotes.csv?s=%s&f=l1' % symbol
# url for getting share value
value = urllib2.urlopen(url) # file containing share value
printvalue(value) # file passed to printvalue() which prints its contents
def printvalue(val):
"""
This function prints the latest share value of the inputted NASDAQ symbol
:arg val: Share value of imputted NASDAQ symbol of a company.
"""
print "Share value: %s" % val.read()
if __name__ == '__main__':
if len(sys.argv) != 2: #checks if command line parameters are equal to 2 or not
print "Wrong parameter"
print "Enter the command in this format: ./sharevalue.py <a valid NASDAQ symbol>"
sys.exit(1)
getvalue(sys.argv[1])
#NASDAQ symbol passed to getvalue() if entered command is in correct format
The script can be found here