Add DataFrame.size and Series.size

docs/source/reference/supported_apis.rst

@@ -338,7 +338,7 @@ script instead of being modified manually.
 +---------------------------------------+------------+
 | ``ed.DataFrame.shift()``              | No         |
 +---------------------------------------+------------+
-| ``ed.DataFrame.size``                 | No         |
+| ``ed.DataFrame.size``                 | **Yes**    |
 +---------------------------------------+------------+
 | ``ed.DataFrame.skew()``               | No         |
 +---------------------------------------+------------+
@@ -910,7 +910,7 @@ script instead of being modified manually.
 +---------------------------------------+------------+
 | ``ed.Series.shift()``                 | No         |
 +---------------------------------------+------------+
-| ``ed.Series.size``                    | No         |
+| ``ed.Series.size``                    | **Yes**    |
 +---------------------------------------+------------+
 | ``ed.Series.skew()``                  | No         |
 +---------------------------------------+------------+

eland/ndframe.py

@@ -17,6 +17,7 @@
 
 import sys
 from abc import ABC, abstractmethod
+from typing import Tuple
 
 from eland.query_compiler import QueryCompiler
 
@@ -505,3 +506,28 @@ def tail(self, n=5):
     @abstractmethod
     def sample(self, n=None, frac=None, random_state=None):
         pass
+
+    @property
+    def shape(self) -> Tuple[int, ...]:
+        raise NotImplementedError
+
+    @property
+    def size(self) -> int:
+        """
+        Return an int representing the number of elements in this object.
+
+        Return the number of rows if Series. Otherwise return the number of rows times number of columns if DataFrame.
+
+        Returns
+        -------
+        int:
+            Number of elements in the object
+
+        See Also
+        --------
+        :pandas_api_docs:`pandas.DataFrame.size`
+        """
+        product = 0
+        for dim in self.shape:
+            product = (product or 1) * dim
+        return product

eland/tests/dataframe/test_shape_pytest.py

@@ -38,3 +38,10 @@ def test_flights_shape(self):
         ed_shape = ed_flights.shape
 
         assert pd_shape == ed_shape
+
+    def test_size(self):
+        pd_flights = self.pd_flights()
+        ed_flights = self.ed_flights()
+
+        assert pd_flights.size == ed_flights.size
+        assert pd_flights.FlightDelayMin.size == ed_flights.FlightDelayMin.size