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import urllib
import csv
import psycopg2
from sys import argv
from os.path import basename, splitext
def yahooCsv(name):
params = urllib.urlencode({ "s" : name,
"a" : 0,
"b" : 1,
"c" : 1990,
"d" : 11,
"e" : 30,
"f" : 2010,
"g" : "d",
"ignore" : ".csv" })
handler = urllib.urlopen("http://ichart.finance.yahoo.com/table.csv?{}"
.format(params))
return csv.DictReader(handler)
def addTickerHistory(name, handler, cursor, conn):
cursor.execute("SELECT stockid FROM stock WHERE ticker=%s",(name,))
if cursor.rowcount == 0:
cursor.execute("INSERT INTO stock(ticker) VALUES (%s) RETURNING stockid",(name,))
id = cursor.fetchone()[0]
else:
id = cursor.fetchone()[0]
def clean(field):
if field == "NA":
return None
else:
return field
for row in handler:
for (key, value) in row.items():
row[key] = clean(value)
cursor.execute("INSERT INTO history(date, stockID, open, high, low,"
"close, volume, adjClose, div, adjDiv, split) "
"VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)",
(row['Date'], id, row['Open'], row['High'], row['Low'],
row['Unadj.Close'], row['Volume'], row['Close'],
row['Div'], row['Adj.Div'], row['Split'] ) )
conn.commit()
if __name__ == '__main__':
if len(argv) != 5:
print argv[0], "<database> <user> <passwd> <filename>"
exit(1)
database = argv[1]
user = argv[2]
password = argv[3]
conn = psycopg2.connect(database=database, user=user, password=password)
cursor = conn.cursor()
filename = argv[4]
handler = open(filename,"r")
ticker = splitext(basename(filename))[0] #get the ticker from the filename
csvHandler = csv.DictReader(handler)
addTickerHistory(ticker, csvHandler, cursor, conn)
cursor.close()
conn.close()
handler.close()
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