On empty dataframes, methods (that go through __getattribute__) default to pandas

[anmyachev]

However, magic methods do not pass through function __getattribute__ (for example: __setitem__). Should we do a similar check for them?

Also, for some functions, code branches remained for cases where one of several axes has zero length (for example: insert). In the current implementation, these code paths are unreachable for the thread of execution. I think that they need to be removed. @modin-project/modin-core what do you think about this?

Links:

• modin/modin/pandas/base.py

  Line 3825 in 0ab04e1

  def __getattribute__(self, item):

• modin/modin/pandas/dataframe.py

  Line 1136 in 0ab04e1

  if not self._query_compiler.lazy_execution and len(self.index) == 0:

[vnlitvinov]

I guess this should be a subset of #4605 now.