New example script for prices dababase. Thanks to Christoph Holtermann for contributing to this.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@19922 57a11ea4-9604-0410-9ed3-97b8803252fd

optional/python-bindings/example_scripts/price_database_example.py

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+#!/usr/bin/env python
+# Test file for price database stuff
+# To update the price database call
+# $PATH/gnucash  --add-price-quotes $PATHTOFILE
+# before running this.
+# Adding to a calling bash script would be better
+# Although calling it from here would be even better!
+#  OR:  export PYTHONPATH=$HOME/progs/lib/python2.6/site-packages
+# Then: gnucash-env ipython
+# The account file is not saved but always use a disposable copy.
+# Change, FILE, CURRENCY and STOCK to those defined in your test account.
+# Thanks for contributions by Christoph Holtermann
+
+import gnucash
+from gnucash.gnucash_core_c import gnc_pricedb_get_db, gnc_pricedb_get_prices, gnc_pricedb_lookup_latest,gnc_pricedb_print_contents
+from gnucash.gnucash_core import *
+
+# -------------------------------------------
+# Configuration options can be changed here :
+
+cur_mnemonic="EUR"                      # Possibilities include "EUR","GBP"
+namespace = "EUREX"                     # Predefined namespaces are "CURRENCY","EUREX","AMEX","template"
+show_prices = True
+commodity_fullname = "ThyssenKrupp AG"  # If no name is given, all commoditys in namespace will be printed out
+FILE = "PATH_TO_YOUR_TEST_FILE"         # File is not saved but use a copy anyway
+url = "xml://"+FILE
+
+# Configuration end
+# -------------------------------------------
+
+session = Session(url, True, False, False)
+
+root = session.book.get_root_account()
+book = session.book
+pdb = book.get_price_db()
+comm_table = book.get_table()
+
+cur = comm_table.lookup("CURRENCY", cur_mnemonic)
+cur_name = cur.get_fullname()
+
+# Get a list of all commodities in namespace
+commodities=comm_table.get_commodities(namespace)
+
+if not commodities:
+  print "No commodity in namespace "+namespace+" !"
+  quit()
+
+if commodity_fullname:
+  print "Searching commodity '"+commodity_fullname+"' in namespace "+namespace
+else:
+  print "Commoditys in namespace "+namespace+":"
+
+for i in range(len(commodities)):
+  c=gnucash.GncCommodity(instance=commodities[i])
+  commodities[i]=c
+
+  c_fullname = c.get_fullname()
+
+  if not(commodity_fullname) or (commodity_fullname == c_fullname):
+    print "["+str(i)+"] Full Name :", c.get_fullname()
+    if show_prices:
+      pl = pdb.get_prices(c,cur)
+      if pl:
+        print "{0} {1:20}{2:10} {3}".format("Time      ","Source","Price","Currency")
+        for i in pl:
+           pr = GncPrice(instance=i)
+           source = pr.get_source()
+           time = pr.get_time()
+           v=pr.get_value()
+           price = float(v.num)/v.denom
+
+           print "{0} {1:20}{2:10.4f} {3}".format(time,source,price,cur_name)
+           # I didn't find out how to format the time option...
+
+session.end()
+session.destroy()
+quit()