Made some serialization params options.

Author: eriq-augustine

edq/net/exchange.py

@@ -156,7 +156,7 @@ def hash_content(self) -> str:
         return edq.util.hash.sha256_hex(hash_content)
 
     def to_dict(self,
-            context: edq.util.serial.SerializationContext,
+            context: typing.Union[edq.util.serial.SerializationContext, None] = None,
             ) -> typing.Dict[str, typing.Any]:
         data = vars(self).copy()
 
@@ -587,7 +587,7 @@ def compute_relpath(self, http_exchange_extension: str = DEFAULT_HTTP_EXCHANGE_E
         return os.path.join(dirname, filename)
 
     def to_dict(self,
-            context: edq.util.serial.SerializationContext,
+            context: typing.Union[edq.util.serial.SerializationContext, None] = None,
             ) -> typing.Dict[str, typing.Any]:
         return vars(self)
 

edq/util/serial.py

@@ -73,14 +73,17 @@ class PODSerializer(SerializationBase):
     """
 
     def to_pod(self,
-            context: SerializationContext,
+            context: typing.Union[SerializationContext, None] = None,
             ) -> PODType:
         """
         Get a POD representation of this object.
 
         The default implementation will convert to a dict (similar to a DictSerializer).
         """
 
+        if (context is None):
+            context = SerializationContext()
+
         data: typing.Dict[str, typing.Any] = {}
 
         for (key, value) in vars(self).items():
@@ -222,11 +225,11 @@ def copy(self,
             context: typing.Union[SerializationContext, None] = None,
             ) -> 'PODConverter':
         """
-        Make a copy of this object.
+        Make a deep copy of this object.
         The default implementation will use to_pod() and from_pod() to make a copy.
 
-        This copy may be shallow or deep depending on the underlying class,
-        but implementers should favor deep copies.
+        Callers should be cautious of fileds that are skipped in serialization,
+        e.g., via `SerializationBase.serialization_skip_fields`.
         """
 
         if (context is None):
@@ -245,7 +248,7 @@ class DictSerializer(PODSerializer):
     """
 
     def to_dict(self,
-            context: SerializationContext,
+            context: typing.Union[SerializationContext, None] = None,
             ) -> typing.Dict[str, typing.Any]:
         """
         Return a dict that can be used to represent this object.

edq/util/serial_test.py

@@ -32,7 +32,7 @@ def __init__(self,
         self.value: str = value
 
     def to_pod(self,
-            context: edq.util.serial.SerializationContext,
+            context: typing.Union[edq.util.serial.SerializationContext, None] = None,
             ) -> str:
         return self.value
 

edq/util/time.py

@@ -228,7 +228,7 @@ def guess(value: typing.Any) -> 'Timestamp':
         return Timestamp.from_pytime(value)
 
     def to_pod(self,
-            context: edq.util.serial.SerializationContext,
+            context: typing.Union[edq.util.serial.SerializationContext, None] = None,
             ) -> int:
         return self