Basis of database building

* database.sql contains de database schema
* database.py populates the database

1 files changed, 58 insertions, 0 deletions

diff --git a/database.py b/database.py
new file mode 100644
index 0000000..c00ccd8
--- /dev/null
+++ b/database.py
@@ -0,0 +1,58 @@
+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,))
+        conn.commit()
+        id = cursor.fetchone()[0]
+    else:
+        id = cursor.fetchone()[0]
+        
+    def clean(field):
+        if field == "NA":
+            return None
+
+    for row in handler:
+        cursor.execute("INSERT INTO history(date, stockID, open) VALUES (%s, %s, %s)",
+                       (row['Date'], id, row['Open']))
+        
+    conn.commit()
+        
+if __name__ == '__main__':
+    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]
+    csvHandler = csv.DictReader(handler)
+    
+    addTickerHistory(ticker, csvHandler, cursor, conn)
+
+    cursor.close()
+    conn.close()
+    handler.close()
+    
+