Add placeholder for implementing specifiying precision on writes (xref …

…#13)

aioinflux/client.py

@@ -188,6 +188,7 @@ async def write(
         data: Union[PointType, Iterable[PointType]],
         measurement: Optional[str] = None,
         db: Optional[str] = None,
+        precision: Optional[str] = None,
         rp: Optional[str] = None,
         tag_columns: Optional[Iterable] = None,
         **extra_tags,
@@ -210,12 +211,18 @@ async def write(
             When writing dictionary-like data, this field is treated as the default value
             for points that do not contain a `measurement` field.
         :param db: Database to be written to. Defaults to `self.db`.
+        :param precision: Sets the precision for the supplied Unix time values.
+            Ignored if input timestamp data is of non-integer type.
+            Valid values: ``{'ns', 'u', 'µ', 'ms', 's', 'm', 'h'}``
         :param rp: Sets the target retention policy for the write. If unspecified,
             data is written to the default retention policy.
         :param tag_columns: Columns to be treated as tags (used when writing DataFrames only)
         :param extra_tags: Additional tags to be added to all points passed.
         :return: Returns `True` if insert is successful. Raises `ValueError` exception otherwise.
         """
+        if precision is not None:
+            # FIXME: Implement. Related issue: aioinflux/pull/13
+            raise NotImplementedError("'precision' parameter is not supported yet")
         data = serialization.parse_data(data, measurement, tag_columns, **extra_tags)
         logger.debug(data)
         params = {'db': db or self.db}