def calculate_profit(activities, test_only=False, year=None, splits=None):
buy_action = defaultdict(list)
if year is None:
if len(activities) > 0:
last_year = activities[-1].settle_date.year
else:
last_year = 2020
else:
last_year = year
income = Decimal(0)
cost = Decimal(0)
context = Context(prec=12, rounding=ROUND_DOWN)
for activity in activities:
if activity.type == 'BUY':
if test_only:
rate = 1
else:
rate = exchange_rate(activity.currency.lower(),
activity.settle_date)
buy_action[activity.symbol].append(
(activity.quantity, activity.price * rate))
else:
actions = buy_action[activity.symbol]
actions_q = [q for q, _ in actions]
sum_quantity = Decimal(0)
for q in actions_q:
sum_quantity = context.add(sum_quantity, q)
if sum_quantity < activity.quantity:
raise AccountException(
f"Brakuje cen akcji {activity.symbol} w ilości "
f"{activity.quantity - sum_quantity}. Dodaj pliki z brakującymi danymi"
)
else:
avg_price = sum([q * p for q, p in actions]) / sum_quantity
# calculate profit only for the last year
if activity.settle_date.year == last_year:
# get exchange rate from nbp
if test_only:
rate = 1
else:
rate = exchange_rate(activity.currency.lower(),
activity.settle_date)
income += activity.quantity * activity.price * rate
cost += avg_price * activity.quantity
current_quantity = activity.quantity
for i, item in enumerate(actions):
q, p = item
if q < current_quantity:
current_quantity = current_quantity - q
actions[i] = (0, p)
else:
q -= current_quantity
actions[i] = (q, p)
current_quantity = 0
return income, cost, last_year
def task_info_page(request):
context = {}
task_info = ts.objects.all()[0]
# task_info = get_list_or_404(ts, theExaminer = request.user).lastest('submitTime')
today = timezone.now()
if task_info :
last_update = task_info.submitTime
if ((last_update.year == today.year) and (last_update.month == today.month)) :
# get and calc task info
decimalContext = Context(prec = 4) # set Decimal precision
# yi tong
context['yiTongRenWuLiang'] = mt(theExaminer=request.user, year = today.year, month = today.month).objects.monthlyTask
context['yiChuAn'] = task_info.yiChuAn
context['xyJian'] = task_info.xyJian
context['xyLv'] = task_info.xyJian / task_info.yiChuAn
context['yiTongLv'] = decimalContext.divide(task_info.yiChuAn, Decimal(8.05)) * 100
#jie an
context['jieAnRenWuLiang'] = 2
context['shouQuan'] = task_info.shouQuan
context['boHui'] = task_info.boHui
context['shiChe'] = task_info.shiChe
context['jieAnLiang'] = decimalContext.add( \
decimalContext.add(context['shouQuan'], context['boHui']), \
context['shiChe'])
context['jieAnLv'] = decimalContext.divide(context['jieAnLiang'], Decimal(context['jieAnRenWuLiang'])) * 100
else:
# get and calc task info
decimalContext = Context(prec = 4) # set Decimal precision
# yi tong
context['yiTongRenWuLiang'] = 8.05
context['yiChuAn'] = 0
context['xyJian'] = 0
context['xyLv'] = 0
context['yiTongLv'] = decimalContext.divide(0, Decimal(8.05)) * 100
#jie an
context['jieAnRenWuLiang'] = 2
context['shouQuan'] = 0
context['boHui'] = 0
context['shiChe'] = 0
context['jieAnLiang'] = 0
context['jieAnLv'] = 0 * 100
return render(request, 'task_submit/task_info.html', context)
class _Amount:
def __init__(self, fraction_digits: int, precision: int):
self._ctx = Context(prec=precision, rounding=ROUND_HALF_EVEN)
self._fraction_digits = fraction_digits
self._precision = precision
self._quantizer = self._ctx.create_decimal(1).scaleb(-fraction_digits)
self._value = self._ctx.create_decimal(0)
def deserialize(self, serialized_value):
self._value = (
self._ctx.create_decimal(serialized_value)
.scaleb(-self._fraction_digits)
.quantize(self._quantizer)
)
return self
def serialize(self) -> int:
return int(self._value.scaleb(self._fraction_digits))
def set(self, value: Decimal):
self._value = self._ctx.create_decimal(value).quantize(self._quantizer)
return self
def clone(self):
raise NotImplementedError
def __str__(self):
return str(self._value)
def __imul__(self, other):
operand = other._value if isinstance(other, Amount) else other
value = self._ctx.multiply(self._value, operand)
return self.set(value)
def __itruediv__(self, other):
operand = other._value if isinstance(other, Amount) else other
value = self._ctx.divide(self._value, operand)
return self.set(value)
def __mul__(self, other):
return self.clone().__imul__(other)
def __truediv__(self, other):
return self.clone().__itruediv__(other)
def __iadd__(self, other):
operand = other._value if isinstance(other, Amount) else other
value = self._ctx.add(self._value, operand)
return self.set(value)
def __add__(self, other):
return self.clone().__iadd__(other)
