Fix bug/syntax in python examples (#8658)

* CustomDataRegressionAlgorithm

* DescendingCustomDataObjectStoreRegressionAlgorithm

* CustomDataPropertiesRegressionAlgorithm

* DateTime -> should be datetime

* KerasNeuralNetworkAlgorithm

* OptionIndicatorsMirrorContractsRegressionAlgorithm

* BybitCustomDataCryptoRegressionAlgorithm

* DropboxBaseDataUniverseSelectionAlgorithm

* UserDefinedUniverseAlgorithm

* CompleteOrderTagUpdateAlgorithm

* BasicTemplateOptionEquityStrategyAlgorithm hint

* ETFConstituentUniverseFrameworkRegressionAlgorithm

* FutureStopMarketOrderOnExtendedHoursRegressionAlgorithm

* SecurityDynamicPropertyPythonClassAlgorithm

* hint

* hinting

* CallbackCommandRegressionAlgorithm

* CustomWarmUpPeriodIndicatorAlgorithm

* CrunchDAOSignalExportDemonstrationAlgorithm

* ExpiryHelperAlphaModelFrameworkAlgorithm

* ClassicRenkoConsolidatorAlgorithm

* SmaCrossUniverseSelectionAlgorithm

* PEP8 Fix: Assigning to a Method

* SliceGetByTypeRegressionAlgorithm

* MarketOnCloseOrderBufferExtendedMarketHoursRegressionAlgorithm

* MarketOnCloseOrderBufferRegressionAlgorithm

* CustomIndicatorAlgorithm

* ScheduledQueuingAlgorithm

* ComboOrdersFillModelAlgorithm

* CustomIndicatorWithExtensionAlgorithm

* IndicatorWithRenkoBarsRegressionAlgorithm

* CoarseFineOptionUniverseChainRegressionAlgorithm

* NumeraiSignalExportDemonstrationAlgorithm

* DropboxUniverseSelectionAlgorithm

* WeeklyUniverseSelectionRegressionAlgorithm

* AutoRegressiveIntegratedMovingAverageRegressionAlgorithm

* DropboxBaseDataUniverseSelectionAlgorithm

* IronCondorStrategyAlgorithm

* LongAndShortButterflyPutStrategiesAlgorithm

* FutureStopMarketOrderOnExtendedHoursRegressionAlgorithm

* LongAndShortCallCalendarSpreadStrategiesAlgorithm

* KerasNeuralNetworkAlgorithm

* LongAndShortPutCalendarSpreadStrategiesAlgorithm

* OptionPriceModelForOptionStylesBaseRegressionAlgorithm

* TensorFlowNeuralNetworkAlgorithm

* MarketOnCloseOrderBufferRegressionAlgorithm

* MarketOnCloseOrderBufferExtendedMarketHoursRegressionAlgorithm

* typing

* ComboOrderTicketDemoAlgorithm

* PytorchNeuralNetworkAlgorithm

* MultipleSymbolConsolidationAlgorithm

* fixes

* revert getattr mypy syntax

* address peer review

* Addresses Peer-Review

---------

Co-authored-by: Alexandre Catarino <AlexCatarino@users.noreply.github.com>

Algorithm.Python/SecurityDynamicPropertyPythonClassAlgorithm.py

@@ -14,45 +14,47 @@
 from AlgorithmImports import *
 from collections import deque
 
+import numpy as np
+
 ### <summary>
 ### Algorithm asserting that security dynamic properties keep Python references to the Python class they are instances of,
 ### specifically when this class is a subclass of a C# class.
 ### </summary>
 class SecurityDynamicPropertyPythonClassAlgorithm(QCAlgorithm):
-    def initialize(self):
+    def initialize(self) -> None:
         self.set_start_date(2013, 10, 7)
         self.set_end_date(2013, 10, 7)
 
-        self.spy = self.add_equity("SPY", Resolution.MINUTE)
+        self._spy = self.add_equity("SPY", Resolution.MINUTE)
 
         custom_sma = CustomSimpleMovingAverage('custom', 60)
-        self.spy.custom_sma = custom_sma
-        custom_sma.security = self.spy
+        self._spy.custom_sma = custom_sma
+        custom_sma.security = self._spy
 
-        self.register_indicator(self.spy.symbol, self.spy.custom_sma,  Resolution.MINUTE)
+        self.register_indicator(self._spy.symbol, self._spy.custom_sma, Resolution.MINUTE)
 
     def on_warmup_finished(self) -> None:
-        if type(self.spy.custom_sma) != CustomSimpleMovingAverage:
+        if type(self._spy.custom_sma) != CustomSimpleMovingAverage:
             raise AssertionError("spy.custom_sma is not an instance of CustomSimpleMovingAverage")
 
-        if self.spy.custom_sma.security is None:
+        if not self._spy.custom_sma.security:
             raise AssertionError("spy.custom_sma.security is None")
         else:
-            self.debug(f"spy.custom_sma.security.symbol: {self.spy.custom_sma.security.symbol}")
+            self.debug(f"spy.custom_sma.security.symbol: {self._spy.custom_sma.security.symbol}")
 
     def on_data(self, slice: Slice) -> None:
-        if self.spy.custom_sma.is_ready:
-            self.debug(f"CustomSMA: {self.spy.custom_sma.current.value}")
+        if self._spy.custom_sma.is_ready:
+            self.debug(f"CustomSMA: {self._spy.custom_sma.current.value}")
 
 class CustomSimpleMovingAverage(PythonIndicator):
-    def __init__(self, name, period):
+    def __init__(self, name: str, period: int) -> None:
         super().__init__()
         self.name = name
         self.value = 0
-        self.queue = deque(maxlen=period)
+        self._queue = deque(maxlen=period)
 
-    def update(self, input):
-        self.queue.appendleft(input.value)
-        count = len(self.queue)
-        self.value = np.sum(self.queue) / count
-        return count == self.queue.maxlen
+    def update(self, input: IndicatorDataPoint) -> bool:
+        self._queue.appendleft(input.value)
+        count = len(self._queue)
+        self.value = np.sum(self._queue) / count
+        return count == self._queue.maxlen