Module dsl

Expand description

Domain specific language for the Lazy API.

Re-exports§

ArrayNameSpacedtype-array: Specialized expressions for Series of DataType::Array.
ChainedThen: Utility struct for the when-then-otherwise expression.
ChainedWhen: Utility struct for the when-then-otherwise expression.
ExprNameNameSpace: Specialized expressions for modifying the name of existing expressions.
FieldsMapper
JoinOptions
ListNameSpace: Specialized expressions for Series of DataType::List.
MetaNameSpacemeta: Specialized expressions for Categorical dtypes.
RollingCovOptions
SpecialEq: Wrapper type that has special equality properties depending on the inner type specialization
StrptimeOptions
StructNameSpacedtype-struct: Specialized expressions for Struct dtypes.
Then: Utility struct for the when-then-otherwise expression.
UnpivotArgsDSL
When: Utility struct for the when-then-otherwise expression.

BinaryUdfOutputField
ColumnBinaryUdf: A wrapper trait for any binary closure Fn(Column, Column) -> PolarsResult<Column>
ColumnsUdf: A wrapper trait for any closure Fn(Vec<Series>) -> PolarsResult<Series>
FunctionOutputField
RenameAliasFn

apply_multiple: Apply a function/closure over the groups of multiple columns. This should only be used in a group_by aggregation.
binary_expr: Compute op(l, r) (or equivalently l op r). l and r must have types compatible with the Operator.
first: First column in a DataFrame.
last: Last column in a DataFrame.
len: Return the number of rows in the context.
map_list_multiple: Apply a function/closure over multiple columns once the logical plan get executed.
map_multiple: Apply a function/closure over multiple columns once the logical plan get executed.
nth: Nth column in a DataFrame.
ternary_expr
when: Start a when-then-otherwise expression.