Array

The following methods are available under the expr.arr attribute.

Expr.arr.max()	Compute the max values of the sub-arrays.
Expr.arr.min()	Compute the min values of the sub-arrays.
Expr.arr.median()	Compute the median of the values of the sub-arrays.
Expr.arr.sum()	Compute the sum values of the sub-arrays.
Expr.arr.std([ddof])	Compute the std of the values of the sub-arrays.
Expr.arr.to_list()	Convert an Array column into a List column with the same inner data type.
Expr.arr.unique(*[, maintain_order])	Get the unique/distinct values in the array.
Expr.arr.n_unique()	Count the number of unique values in every sub-arrays.
Expr.arr.var([ddof])	Compute the var of the values of the sub-arrays.
Expr.arr.all()	Evaluate whether all boolean values are true for every subarray.
Expr.arr.any()	Evaluate whether any boolean value is true for every subarray.
Expr.arr.sort(*[, descending, nulls_last])	Sort the arrays in this column.
Expr.arr.reverse()	Reverse the arrays in this column.
Expr.arr.arg_min()	Retrieve the index of the minimal value in every sub-array.
Expr.arr.arg_max()	Retrieve the index of the maximum value in every sub-array.
Expr.arr.get(index, *[, null_on_oob])	Get the value by index in the sub-arrays.
Expr.arr.first()	Get the first value of the sub-arrays.
Expr.arr.last()	Get the last value of the sub-arrays.
Expr.arr.join(separator, *[, ignore_nulls])	Join all string items in a sub-array and place a separator between them.
Expr.arr.explode()	Returns a column with a separate row for every array element.
Expr.arr.contains(item)	Check if sub-arrays contain the given item.
Expr.arr.count_matches(element)	Count how often the value produced by element occurs.
Expr.arr.to_struct([fields])	Convert the Series of type Array to a Series of type Struct.
Expr.arr.shift([n])	Shift array values by the given number of indices.