fix component time getter to allow no time before connect phase

src/finam/schedule.py

@@ -11,9 +11,9 @@ Composition
 """
 import logging
 import sys
-from time import strftime
 from datetime import datetime
 from pathlib import Path
+from time import strftime
 
 from .errors import (
     FinamCircularCouplingError,

src/finam/sdk/component.py

 """
 Abstract base implementations for components with and without time step.
 """
-import datetime
 import collections
+import datetime
 import logging
 from abc import ABC
 from datetime import datetime
@@ -440,7 +440,8 @@ class TimeComponent(ITimeComponent, Component, ABC):
         if self._time is None and self.status in (
             ComponentStatus.CREATED or ComponentStatus.INITIALIZED
         ):
-            """A time of None is ok before the connect phase"""
+            return None
+
         if not isinstance(self._time, datetime):
             with ErrorLogger(self.logger):
                 raise ValueError("Time must be of type datetime")