feat: Add name string property to dy.Column

[delsner]

Motivation

Fixes #51.

Changes

Add dynamic name property to dy.Column.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (e0c30b4) to head (c8570b5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #52   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           41        41           
  Lines         2148      2153    +5     
=========================================
+ Hits          2148      2153    +5     

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[borchero]

I had one thought: could we somehow make .col and .alias (or something like .name) be populated dynamically? Specifically, we could overwrite __getattr__ (or __getattribute__, I always forget what's the right one) of Schema and set the column name there, i.e.

def __getattr__(self, name: str) -> Any:
    val = super().__getattr__(name)
    if isinstance(val, Column):
        val.name = val.alias or name
    return val

That would also allow fixing the problem that we had discussed previously where you can't set the column of a schema based on the column of another schema, i.e. something like

column = OtherSchema.column_with_other_name

[borchero]

Nice!