Feature/#336 - Filter numpy array exposed type

[trgiangdo]

#336

A few things we need to consider:

• We should probably also consider to expose the Operator and JoinOperator at the taipy init level.
• If the exposed type is numpy, then the key is the index of the column. If the user wants to filter by row value, we need to find a way to allow that.

[github-actions]

☂️ Python Cov

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
8175	7760	95%	85%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
src/taipy/core/_entity/_migrate/_utils.py	85%	🟢
src/taipy/core/data/_abstract_sql.py	92%	🟢
src/taipy/core/data/_filter.py	91%	🟢
src/taipy/core/data/csv.py	95%	🟢
src/taipy/core/data/data_node.py	99%	🟢
src/taipy/core/data/parquet.py	98%	🟢
src/taipy/core/data/sql.py	97%	🟢
src/taipy/core/data/sql_table.py	98%	🟢
TOTAL	94%	🟢

updated for commit: bb54978 by action🐍

[toan-quach]

lgtm

[jrobinAV]

1. excel.py should also be updated with the return type of method _read_as_numpy.

2. I would like to challenge the design:

   • I am not sure to understand the purpose of the _FilterDataNode class
   • I would like to move the whole filtering logic out of the DataNode class. The datanode.filter method could delegate the filtering logic to a dedicated class like Filter. What do you think?

[trgiangdo]

1. That method of excel can also return a dict of array, I should update it as well.

2.1. Me neither 🥲 I think we can remove it since it is not documented at all.

2.2. I agree with moving the logic to a dedicate file. And if I understand correctly, the filter() method should still return the filtered data directly, not returning the Filter class right?

[trgiangdo]

In this PR:

New feature:

• Ability to filter numpy exposed_type

Refactoring:

• Refactor the _FilterDataNode class. Move the logic of the DataNode.filter() method to the _FilterDataNode class.
• Simplify the getitem method of DataNode, make it consistent with DataNode.filter() method.
• Add unit tests for filtering all data node types.

Bug fixes:

• Fix unable to to filter excel data node (because excel data node return a dictionary of exposed_type, not the direct exposed_type).
• Fix unable to filter JSONDataNode when the data is a list of dictionaries.
• Fix unable to filter a list of objects (custom exposed type) when some object has an attribute that others don't.
• Fix unable to write to SQLDataNode due to not converting the string query into SQL text query (raised by issue BUG-Can not write to a SQL Data node #816).