Add session.col() method for deferred series expressions#30
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This method mimics pd.col() from pandas 3.0/Ibis, returning a deferred Series object. This allows for column selection and expression building without a concrete DataFrame context. Added tests in `tests/unit/session/test_col.py`. Co-authored-by: tswast <247555+tswast@users.noreply.github.com>
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| """Return a new expression object which is a deferred series.""" | ||
| import leanframe.core.series | ||
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| return leanframe.core.series.Series(ibis.deferred[name]) |
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@jules Please introduce a new expression type for this. Don't use Series here.
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I've introduced a new leanframe.core.expression.Expression class to handle deferred series expressions, as requested. The col method now returns an instance of this new class instead of Series.
- Added `leanframe/core/expression.py` defining the `Expression` class. - Updated `Session.col` to return an `Expression` instead of `Series`. - Updated tests to verify `Expression` usage. Co-authored-by: tswast <247555+tswast@users.noreply.github.com>
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Implemented
col(name)method inSessionclass inleanframe/core/session.py.It returns a
leanframe.core.series.Seriesobject wrapping anibis.deferredexpression.Added comprehensive tests covering
assignand arithmetic operations with deferred series.PR created automatically by Jules for task 6802571468191900858 started by @tswast