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@eitsupi eitsupi released this 12 Feb 07:27
v0.14.0
8387e0a

Breaking changes due to Rust-polars update

  • rust-polars is updated to 0.37.0 (#776).
    • Minimum supported Rust version (MSRV) is now 1.74.1.
    • $with_row_count() for DataFrame and LazyFrame is deprecated and will be removed in 0.15.0. It is replaced by $with_row_index().
    • pl$count() is deprecated and will be removed in 0.15.0. It is replaced by pl$len().
    • $explode() for DataFrame and LazyFrame doesn't work anymore on string columns.
    • $list$join() and pl$concat_str() gain an argument ignore_nulls. The current behavior is to return a null if the row contains any null. Setting ignore_nulls = TRUE changes that.
    • All row_count_* args in reading/scanning functions are renamed row_index_*.
    • $sort() for Series gains an argument nulls_last.
    • $str$extract() and $str$zfill() now accept an Expr and parse strings as column names. Use pl$lit() to recover the old behavior.
    • $cum_count() now starts from 1 instead of 0.

Other breaking changes

  • The simd feature of the Rust library is removed in favor of the new nightly feature (#800). If you specified simd via the LIBR_POLARS_FEATURES environment variable during source installations, please use nightly instead; there is no change if you specified full_features because it now contains nightly instead of simd.
  • The following functions were deprecated in 0.13.0 and are now removed (#783):
    • $list$lengths() -> $list$len()
    • pl$from_arrow() -> as_polars_df() or as_polars_series()
    • pl$set_options() and pl$reset_options() -> polars_options()
  • $is_between() had several changes (#788):
    • arguments start and end are renamed lower_bound and upper_bound. Their behaviour doesn't change.
    • include_bounds is renamed closed and must be one of "left", "right", "both", or "none".
  • polars_info() returns a slightly changed list.
    • $threadpool_size, which means the number of threads used by Polars, is changed to $thread_pool_size (#784)
    • $version, which indicates the version of this package, is changed to $versions$r_package (#791).
    • $rust_polars, which indicates the version of the dependent Rust Polars, is changed to $versions$rust_crate (#791).
  • New behavior when creating a DataFrame with a single list-variable. pl$DataFrame(x = list(1:2, 3:4)) used to create a DataFrame with two columns named "new_column" and "new_column_1", which was unexpected. It now produces a DataFrame with a single list variable. This also applies to list-column created in $with_columns() and $select() (#794).

Deprecations

  • pl$threadpool_size() is deprecated and will be removed in 0.15.0. Use pl$thread_pool_size() instead (#784).

New features

  • Implementation of the subnamespace $arr for expressions on array-type columns. An array column is similar to a list column, but is stricter as each sub-array must have the same number of elements (#790).

Other improvements

  • The sql feature is included in the default feature (#800). This means that functionality related to the RPolarsSQLContext class is now always included in the binary package.
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