Created
September 10, 2020 16:14
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Convert Betterment Cost Basis report into a format importable by Yahoo Finance Portfolios.
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| #!/usr/bin/env python | |
| import sys | |
| import argparse | |
| import csv | |
| import operator | |
| import logging | |
| import datetime | |
| def get_trade_date(record): | |
| purchase_date = record["PurchaseDate"] | |
| purchase_date = datetime.datetime.strptime(purchase_date, "%m/%d/%Y").date() | |
| return purchase_date.strftime("%Y%m%d") | |
| def get_purchase_price(record): | |
| cost_basis = float(record["CostBasis"]) | |
| shares = float(record["Shares"]) | |
| price = cost_basis / shares | |
| return f"{price:.2f}" | |
| FIELDS = ( | |
| ( | |
| "Symbol", | |
| operator.itemgetter("Symbol"), | |
| ), | |
| ( | |
| "Trade Date", | |
| get_trade_date, | |
| ), | |
| ( | |
| "Purchase Price", | |
| get_purchase_price, | |
| ), | |
| ( | |
| "Quantity", | |
| operator.itemgetter("Shares"), | |
| ), | |
| ( | |
| "Comment", | |
| lambda _: "Imported from Betterment.", | |
| ), | |
| ) | |
| def map_record(record): | |
| return {key: value(record) for (key, value) in FIELDS} | |
| def read_input(path): | |
| if path == "-": | |
| fp = sys.stdin | |
| if fp.isatty(): | |
| logging.warning("reading from terminal") | |
| else: | |
| fp = open(path, "r") | |
| reader = csv.DictReader(fp) | |
| with fp: | |
| yield from reader | |
| def write_output(path, data): | |
| if path == "-": | |
| fp = sys.stdout | |
| else: | |
| fp = open(path, "w") | |
| keys = list(map(operator.itemgetter(0), FIELDS)) | |
| writer = csv.DictWriter(fp, keys) | |
| with fp: | |
| writer.writeheader() | |
| writer.writerows(data) | |
| def main(): | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument("input") | |
| parser.add_argument("output") | |
| args = parser.parse_args() | |
| data = read_input(args.input) | |
| data = map(map_record, data) | |
| data = sorted( | |
| data, | |
| key=lambda record: ( | |
| record["Trade Date"], | |
| record["Symbol"], | |
| record["Quantity"], | |
| ), | |
| ) | |
| write_output(args.output, data) | |
| if __name__ == "__main__": | |
| main() |
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