feat: add aliases for several series properties (#80)

* feat: add aliases for several series properties --------- Co-authored-by: Tim Swast <swast@google.com>

Author: TrevorBergeron

bigframes/series.py

@@ -99,6 +99,10 @@ def shape(self) -> typing.Tuple[int]:
  def size(self) -> int:
  return self.shape[0]
 
+ @property
+ def ndim(self) -> int:
+ return 1
+
  @property
  def empty(self) -> bool:
  return self.shape[0] == 0
@@ -123,6 +127,13 @@ def query_job(self) -> Optional[bigquery.QueryJob]:
  def struct(self) -> structs.StructAccessor:
  return structs.StructAccessor(self._block)
 
+ @property
+ def T(self) -> Series:
+ return self.transpose()
+
+ def transpose(self) -> Series:
+ return self
+
  def _set_internal_query_job(self, query_job: bigquery.QueryJob):
  self._query_job = query_job
 
@@ -362,6 +373,8 @@ def ffill(self, *, limit: typing.Optional[int] = None) -> Series:
  window = bigframes.core.WindowSpec(preceding=limit, following=0)
  return self._apply_window_op(agg_ops.LastNonNullOp(), window)
 
+ pad = ffill
+
  def bfill(self, *, limit: typing.Optional[int] = None) -> Series:
  window = bigframes.core.WindowSpec(preceding=0, following=limit)
  return self._apply_window_op(agg_ops.FirstNonNullOp(), window)
@@ -743,6 +756,8 @@ def agg(self, func: str | typing.Sequence[str]) -> scalars.Scalar | Series:
  agg_ops.lookup_agg_func(typing.cast(str, func))
  )
 
+ aggregate = agg
+
  def skew(self):
  count = self.count()
  if count < 3:

third_party/bigframes_vendored/pandas/core/series.py

@@ -64,6 +64,20 @@ def name(self) -> Hashable:
  """
  raise NotImplementedError(constants.ABSTRACT_METHOD_ERROR_MESSAGE)
 
+ @property
+ def T(self) -> Series:
+ """Return the transpose, which is by definition self."""
+ raise NotImplementedError(constants.ABSTRACT_METHOD_ERROR_MESSAGE)
+
+ def transpose(self) -> Series:
+ """
+ Return the transpose, which is by definition self.
+
+ Returns:
+ Series
+ """
+ raise NotImplementedError(constants.ABSTRACT_METHOD_ERROR_MESSAGE)
+
  def reset_index(
  self,
  *,