Difference between revisions of "Stocks/get prices"

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== This document explains how to import historic stock quotes into gnucash ==
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[[Category:Investment Management]]
  
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Some knowledge of perl and python is required, adding a sample stock to Gnucash is explained here [[stocks/add_stock|Add stock to portfolio]].
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This document presents one way to '''import historic stock quotes''' into GnuCash. This example uses GnuCash's [[Python Bindings]] which may need to be installed separately.
 +
 
 +
;Prerequisite: Some knowledge of Perl and Python is required.
 +
:Ensure that both '''Perl''' and '''Python''' are available.
 +
:You will also need to install the special Perl module '''Finance::QuoteHist''': [[https://metacpan.org/pod/Finance::QuoteHist metacpan.org] or [https://github.com/mojotoad/Finance-QuoteHist github]] and its dependencies.
 +
 
 +
To run the scripts below you need a GnuCash xml file named <tt>test.gnucash</tt>. For illustration, we show how to get prices for an account named <tt>Intel</tt> that contains shares of the INTC stock.  The method for adding the INTC stock to your GnuCash file is explained in [[stocks/add_stock|Add stock to portfolio]]. In addition, you have to add one price of INTC into the database by hand.
 +
 
 +
== Get the data ==
 +
 
 +
We will get the data with Finance::QuoteHist and store it in a text file. The Perl script to get the quotes is as follows: <syntaxhighlight lang="py">
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#!/usr/bin/perl -w
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use Finance::QuoteHist;
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print "Will get stock quotes of $ARGV[0] and save it into the file $ARGV[0]\n";
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$fname = $ARGV[0];
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  open (MYFILE, ">$fname");
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  $q = Finance::QuoteHist->new
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      (
 +
      symbols    => [($ARGV[0])],
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      start_date => '01/01/2000',
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      end_date  => 'today',
 +
      );
 +
 
 +
print "name,date, open, high, low, close, volume\n";
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foreach $row ($q->quotes()) {
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      ($name,$date, $open, $high, $low, $close, $volume) = @$row;
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      print MYFILE "$name,$date, $open, $high, $low, $close, $volume\n";
 +
  }
 +
 
 +
close(MYFILE);
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</syntaxhighlight>
 +
 
 +
On Unix/Linux, save the program text (above) into a file (e.g., get_quotes), make the script executable by running: <syntaxhighlight lang="sh">
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chmod a+x get_quotes
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</syntaxhighlight>
 +
;Example: Execute it with the argument INTC to get the Intel prices saved into the file <tt>INTC</tt>: <syntaxhighlight lang="console">
 +
% chmod a+x get_quotes
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% ./get_quotes INTC
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</syntaxhighlight>
 +
 
 +
:The <tt>INTC</tt> file should look similar to this: <syntaxhighlight lang="text">
 +
INTC,2000/01/03, 83.2700, 87.3700, 83.2500, 87.0000, 57710200
 +
INTC,2000/01/04, 85.4400, 87.8700, 82.2500, 82.9400, 51019600
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INTC,2000/01/05, 83.0000, 85.8700, 80.5000, 83.6200, 52389000
 +
</syntaxhighlight>
 +
 
 +
== Import the data into GnuCash ==
 +
 
 +
The following python script will read the text file <tt>INTC</tt> and add the prices to the GnuCash file <tt>test.gnucash</tt>. <syntaxhighlight lang="py">
 +
 
 +
#!/usr/bin/python
 +
 
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from gnucash import Session, Account, Split
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import gnucash
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import datetime
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from fractions import Fraction
 +
 
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FILE = "./test.gnucash"
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url = "xml://"+FILE
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# Read data from file
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f = open('INTC')
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data = []
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while 1:
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    tmp = f.readline()
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    if(len(tmp)<2):
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        break
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    data.append(tmp)
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f.close()
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stock_date = []
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stock_price = []
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for i in range(1,len(data)):
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    year = int(data[i].rsplit(',')[1].rsplit('/')[0])
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    month = int(data[i].rsplit(',')[1].rsplit('/')[1])
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    day = int(data[i].rsplit(',')[1].rsplit('/')[2])
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    stock_date.append(datetime.datetime(year,month,day))
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    stock_price.append(float(data[i].rsplit(',')[5]))
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# Initialize Gnucash session
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session = Session(url, False, False, False)
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root = session.book.get_root_account()
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book = session.book
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account = book.get_root_account()
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pdb = book.get_price_db()
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commod_table = book.get_table()
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stock = commod_table.lookup('NASDAQ', 'INTC')
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cur = commod_table.lookup('CURRENCY', 'USD')
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# Add the prices
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pdb = book.get_price_db()
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# Get stock data
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pl = pdb.get_prices(stock,cur)
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if len(pl)<1:
 +
  print ('Need at least one database entry to clone ...')
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  session.end()
 +
  session.destroy()
 +
 
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pl0 = pl[0]
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for i in range(1,len(pl)):
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  pdb.remove_price(pl[i])
 +
 
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for i in range(0,len(stock_date)):
 +
  p_new = pl0.clone(book)
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  p_new = gnucash.GncPrice(instance=p_new)
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  print 'Adding',i,stock_date[i],stock_price[i]
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  p_new.set_time64(stock_date[i])
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  v = p_new.get_value()
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  v.num = int(Fraction.from_float(stock_price[i]).limit_denominator(100000).numerator)
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  v.denom = int(Fraction.from_float(stock_price[i]).limit_denominator(100000).denominator)
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  p_new.set_value(v)
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  pdb.add_price(p_new)
 +
 
 +
# Clean up
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session.save()
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session.end()
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session.destroy()
 +
</syntaxhighlight>
 +
 
 +
You now have the stock quotes from Intel in <tt>test.gnucash</tt>.

Latest revision as of 19:08, 12 October 2022


This document presents one way to import historic stock quotes into GnuCash. This example uses GnuCash's Python Bindings which may need to be installed separately.

Prerequisite
Some knowledge of Perl and Python is required.
Ensure that both Perl and Python are available.
You will also need to install the special Perl module Finance::QuoteHist: [metacpan.org or github] and its dependencies.

To run the scripts below you need a GnuCash xml file named test.gnucash. For illustration, we show how to get prices for an account named Intel that contains shares of the INTC stock. The method for adding the INTC stock to your GnuCash file is explained in Add stock to portfolio. In addition, you have to add one price of INTC into the database by hand.

Get the data

We will get the data with Finance::QuoteHist and store it in a text file. The Perl script to get the quotes is as follows: 
#!/usr/bin/perl -w
use Finance::QuoteHist;
print "Will get stock quotes of $ARGV[0] and save it into the file $ARGV[0]\n";
$fname = $ARGV[0];
   open (MYFILE, ">$fname");
   $q = Finance::QuoteHist->new
      (
       symbols    => [($ARGV[0])],
       start_date => '01/01/2000',
       end_date   => 'today',
      ); 

print "name,date, open, high, low, close, volume\n";
foreach $row ($q->quotes()) {
       ($name,$date, $open, $high, $low, $close, $volume) = @$row;
       print MYFILE "$name,$date, $open, $high, $low, $close, $volume\n";
   }

close(MYFILE);
On Unix/Linux, save the program text (above) into a file (e.g., get_quotes), make the script executable by running: 
chmod a+x get_quotes
Example
Execute it with the argument INTC to get the Intel prices saved into the file INTC: 
% chmod a+x get_quotes
% ./get_quotes INTC
The INTC file should look similar to this: 
INTC,2000/01/03, 83.2700, 87.3700, 83.2500, 87.0000, 57710200
INTC,2000/01/04, 85.4400, 87.8700, 82.2500, 82.9400, 51019600
INTC,2000/01/05, 83.0000, 85.8700, 80.5000, 83.6200, 52389000

Import the data into GnuCash

The following python script will read the text file INTC and add the prices to the GnuCash file test.gnucash. 
#!/usr/bin/python

from gnucash import Session, Account, Split
import gnucash
import datetime
from fractions import Fraction

FILE = "./test.gnucash"
url = "xml://"+FILE

# Read data from file
f = open('INTC')
data = []
while 1:
    tmp = f.readline()
    if(len(tmp)<2):
        break
    
    data.append(tmp)

f.close()

stock_date = []
stock_price = []
for i in range(1,len(data)):
    year = int(data[i].rsplit(',')[1].rsplit('/')[0])
    month = int(data[i].rsplit(',')[1].rsplit('/')[1])
    day = int(data[i].rsplit(',')[1].rsplit('/')[2])
    stock_date.append(datetime.datetime(year,month,day))
    stock_price.append(float(data[i].rsplit(',')[5]))

# Initialize Gnucash session
session = Session(url, False, False, False)
root = session.book.get_root_account()
book = session.book
account = book.get_root_account()
pdb = book.get_price_db()
commod_table = book.get_table()
stock = commod_table.lookup('NASDAQ', 'INTC')
cur = commod_table.lookup('CURRENCY', 'USD')
# Add the prices
pdb = book.get_price_db()
# Get stock data
pl = pdb.get_prices(stock,cur)
if len(pl)<1:
  print ('Need at least one database entry to clone ...')
  session.end()
  session.destroy()

pl0 = pl[0]
for i in range(1,len(pl)):
  pdb.remove_price(pl[i])

for i in range(0,len(stock_date)):
  p_new = pl0.clone(book)
  p_new = gnucash.GncPrice(instance=p_new)
  print 'Adding',i,stock_date[i],stock_price[i]
  p_new.set_time64(stock_date[i])
  v = p_new.get_value()
  v.num = int(Fraction.from_float(stock_price[i]).limit_denominator(100000).numerator)
  v.denom = int(Fraction.from_float(stock_price[i]).limit_denominator(100000).denominator)
  p_new.set_value(v)
  pdb.add_price(p_new)

# Clean up
session.save()
session.end()
session.destroy()

You now have the stock quotes from Intel in test.gnucash.

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