Manipulation/selection

Expr.append(other[, upcast])	Append expressions.
Expr.arg_sort(*[, descending, nulls_last])	Get the index values that would sort this column.
Expr.argsort([descending, nulls_last])	Get the index values that would sort this column.
Expr.arg_true()	Return indices where expression evaluates True.
Expr.backward_fill([limit])	Fill missing values with the next to be seen values.
Expr.cast(dtype[, strict])	Cast between data types.
Expr.ceil()	Rounds up to the nearest integer value.
Expr.clip(min_val, max_val)	Clip (limit) the values in an array to a min and max boundary.
Expr.clip_max(max_val)	Clip (limit) the values in an array to a max boundary.
Expr.clip_min(min_val)	Clip (limit) the values in an array to a min boundary.
Expr.drop_nans()	Drop floating point NaN values.
Expr.drop_nulls()	Drop all null values.
Expr.explode()	Explode a list or utf8 Series.
Expr.extend_constant(value, n)	Extremely fast method for extending the Series with 'n' copies of a value.
Expr.fill_nan(fill_value)	Fill floating point NaN value with a fill value.
Expr.fill_null([value, strategy, limit])	Fill null values using the specified value or strategy.
Expr.filter(predicate)	Filter a single column.
Expr.flatten()	Flatten a list or string column.
Expr.floor()	Rounds down to the nearest integer value.
Expr.forward_fill([limit])	Fill missing values with the latest seen values.
Expr.head([n])	Get the first n rows.
Expr.inspect([fmt])	Print the value that this expression evaluates to and pass on the value.
Expr.interpolate([method])	Fill nulls with linear interpolation over missing values.
Expr.limit([n])	Get the first n rows.
Expr.lower_bound()	Calculate the lower bound.
Expr.map_dict(remapping, *[, default])	Replace values in column according to remapping dictionary.
Expr.pipe(function, *args, **kwargs)	Offers a structured way to apply a sequence of user-defined functions (UDFs).
Expr.rechunk()	Create a single chunk of memory for this Series.
Expr.reinterpret([signed])	Reinterpret the underlying bits as a signed/unsigned integer.
Expr.repeat_by(by)	Repeat the elements in this Series as specified in the given expression.
Expr.reshape(dims)	Reshape this Expr to a flat Series or a Series of Lists.
Expr.reverse()	Reverse the selection.
Expr.round(decimals)	Round underlying floating point data by decimals digits.
Expr.sample([n, frac, with_replacement, ...])	Sample from this expression.
Expr.shift([periods])	Shift the values by a given period.
Expr.shift_and_fill(periods, fill_value)	Shift the values by a given period and fill the resulting null values.
Expr.shrink_dtype()	Shrink numeric columns to the minimal required datatype.
Expr.shuffle([seed])	Shuffle the contents of this expression.
Expr.slice(offset[, length])	Get a slice of this expression.
Expr.sort(*[, descending, nulls_last])	Sort this column.
Expr.sort_by(by, *more_by[, descending])	Sort this column by the ordering of other columns.
Expr.tail([n])	Get the last n rows.
Expr.take(indices)	Take values by index.
Expr.take_every(n)	Take every nth value in the Series and return as a new Series.
Expr.to_physical()	Cast to physical representation of the logical dtype.
Expr.top_k([k, descending])	Return the k largest elements.
Expr.upper_bound()	Calculate the upper bound.
Expr.where(predicate)	Filter a single column.