fix(rust, python): Address .col(regex).exclude() operations not executing.

[cmdlineluser]

Fixes #10022

Not sure if this is the optimal way of doing things.

I got rid of the if has_exclude block to let the regex expand and put a call to replace_wildcard_with_column inside expand_regex to remove the exclude nodes.

Current behaviour

import polars as pl

df = pl.DataFrame({'col_1': [1, 2, 3], 'col_2': [2, 4, 3]})

df.select(
    pl.col('^col_.*$').exclude('col_2').mul(10),
    pl.col('^col_.*$').exclude('col_1') / 10
)

# shape: (3, 2)
# ┌───────┬───────┐
# │ col_1 ┆ col_2 │
# │ ---   ┆ ---   │
# │ i64   ┆ i64   │
# ╞═══════╪═══════╡
# │ 1     ┆ 2     │
# │ 2     ┆ 4     │
# │ 3     ┆ 3     │
# └───────┴───────┘

With fix:

df.select(
    pl.col('^col_.*$').exclude('^col_2$').mul(10),
    pl.col('^col_.*$').exclude('col_1') / 10
)

# shape: (3, 2)
# ┌───────┬───────┐
# │ col_1 ┆ col_2 │
# │ ---   ┆ ---   │
# │ i64   ┆ f64   │
# ╞═══════╪═══════╡
# │ 10    ┆ 0.2   │
# │ 20    ┆ 0.4   │
# │ 30    ┆ 0.3   │
# └───────┴───────┘

[ritchie46]

Can you add a test for the issue this fixes?

[ritchie46]

Thank you @cmdlineluser 👍