FIFOStockSellProfitCalculator.py calculates FIFO profits on a LibreOffice calc document with buys and sells in rows.

PROFIT column will contain the "FIFO (First In First Out) profit" after a sell.
Also the mean profit (see TYPE_OF_CALCULATION), or even FIFO and mean row blocks one after another can be calculated (see changes_in_type_of_calculation array).

Each Row represents a single stock operation.
The sell is identified by SELL string on TYPE column, using buys (BUY string on TYPE column) to acumulate previous buys.
ASSET column contains the identification of the type of the asset: each different asset is treated apart.
Other columns needed are PRICE, FEE, VOLUME and COST.
PROFIT column will show FIFO profit (sell - FIFO buys) and on PROFIT_DESC column the ASSET id will be repeated.
Number of significant digits is DECIMAL_NUMBER_PRECISION, and asset volumes below ROUND_IF_BELOW are set to zero.
See Configuration below.

See this page for a step by step guide.

Columns T, U and V and the three accumulated values have been written by the script on the sample file sample.csv (C1:J21):

Tested at least under LibreOffice versions 5 and 6.

Download and use with your own data

You can download sample.withScript.ods and paste your data there with as many rows as needed, respecting each column data type.
Then just do Tools / Macros / Run macro... , unfold the file name from the new window, and select FIFOStockSellProfitCalculator there - then click Run.

If your regional configuration uses ',' as decimal point separator instead of '.', please, download instead sample.withScriptCommaSep.ods. This script contains the same script changing the proper configuration line: DECIMAL_POINT = ','.
Note that you will know that you're running into this regional comma vs point separator if an error like this appears :

com.sun.star.uno.RuntimeException: Error during invoking function FIFOStockSellProfitCalculator in module vnd.sun.star.tdoc:/3/Scripts/python/FIFOStockSellProfitCalculator.py (<class 'decimal.InvalidOperation'>: [<class 'decimal.ConversionSyntax'>]
  File "C:\LibreOffice 6\program\pythonscript.py", line 879, in invoke
ret = self.func( *args )
  File "vnd.sun.star.tdoc:/3/Scripts/python/FIFOStockSellProfitCalculator.py", line 146, in FIFOStockSellProfitCalculator
)

Manually embed the script into a Calc document

The script FIFOStockSellProfitCalculator.py can be manually embedded into any LibreOffice Calc doc (.ods): follow these instructions to do that.

Installation

Copy the file FIFOStockSellProfitCalculator.py to your LibreOffice python scripts directory in order to have it available for any of your projects.
In Windows this would tipically be:

C:\Program Files (x86)\LibreOffice 6\share\Scripts\python\

Then, it can be run on the current Calc document from Tools / Macros...

Running as commandline script

If the LOG script variable is changed to "LOG = 1", useful internal operations are shown on stdout which allows you to follow the operations as they have been processed.
In order to run the script from command line, LibreOffice must be executed with special parameters:

$ ./soffice.bin --calc \
--accept="socket,host=localhost,port=2002;urp;StarOffice.ServiceManager"

Or in Windows:

C:\Program Files (x86)\LibreOffice 6\program> soffice.exe --calc --accept="socket,host=localhost,port=2002;urp;"

Now, open the desired Calc document with the stocks operations. Then, the python executable from LibreOffice installation must be used, so change your pwd to that path and append to it the complete path to your FIFOStockSellProfitCalculator.py script:

C:\Program Files (x86)\LibreOffice 6\program> python.exe C:\FIFOStockSellProfitCalculator.py

Configuration

Modify these script's variable values as convenient:

# make FIFO (1), or average (0) calculation
TYPE_OF_CALCULATION = 1;

# array of changes in TYPE_OF_CALCULATION depending on rows:
# pairs of the type [ row (from this number of row on, inclusive), TYPE_OF_CALCULATION]
# Please, note that rows must be in order of magnitude in the array.
# Example:
# from row 13 on, change TYPE_OF_CALCULATION to 0, and from row 50 to the end change TYPE_OF_CALCULATION to 1:
# changes_in_type_of_calculation = deque( [ [13, 0], [50, 1] ] )
# Default value is no change from initial TYPE_OF_CALCULATION value:  = deque( [] )
changes_in_type_of_calculation = deque( [] )

# decimal numbers precision:
DECIMAL_NUMBER_PRECISION = 6; # 6 significant digits (both integer & decimal places, depending of number size...)

# regional comma separator:
# DECIMAL_POINT is substitued by PYTHON_DECIMAL_POINT, just in case a regional configuration
# be different from the standard decimal point '.'
DECIMAL_POINT = '.' # change this to your regional configuration
PYTHON_DECIMAL_POINT = '.'

# column and value strings definitions:
BEGINNING_OF_DATA = 2   # first row with data
ASSET       = 'C'       # Unique asset id (i.e. USD, EUR, STCKXXXX, etc)
TYPE        = 'E'       # SELL | BUY | other
SELL        = 'sell'    # sell string identifier on TYPE column
BUY         = 'buy'     # buy  string identifier on TYPE column
PRICE       = 'G'
FEE         = 'I'
VOLUME      = 'J'
PROFIT      = 'T'       # column of results
PROFIT_DESC = 'U'       # here the ASSET id will be repeated
ASSETS_VOL  = 'V'       # volume of assets of type ASSET after each buy/sell op
BUY_TO_FIAT = 'W'       # volume of fiat currency (or origin asset) invested in the buy(s) now sold
BUYS_TO_FIAT_VOLUME = 'A'   # volume of fiat currency (or origin asset) accumulated
                            # in buys of assets sold again to fiat currency (or origin asset)
                            # This column will be used in a row after the end of rows of data,
                            # in which a resume of all origin/dest assets will presented.
                            # If fiat currency (or origin asset) is the same in all cases,
                            # the rows can be added in a global result, but this is not done
                            # as a preventive measure to avoid errors of origin fiat/asset judgements.

# round to zero if this quantity of assets is left on some sell:
# NOTE: do no set ROUND_IF_BELOW to values below (previously set) DECIMAL_NUMBER_PRECISION 
ROUND_IF_BELOW = Decimal('5e-06')

# print logs to stdout
LOG = 0

Examples

• sample.withScript.ods, LibreOffice file with embedded script

• sample.withScriptCommaSep.ods, LibreOffice file with embedded script for regions that use ',' as decimal point separator

• sample.csv, plain text data file with the example rows

License

Licensed as GPL v3 or higher.