daft.expressions.Expression.as_py

Expression.as_py(type_: type) → daft.expressions.AsPyExpression

Treats every value on the given expression as an object of the specified type. Users can then call methods on this object, which will be translated into a method call on every value on the Expression.

Example

>>> # call .resize(28, 28) on every item in the expression
>>> col("images").as_py(Image).resize(28, 28)
>>>
>>> # get the 0th element of every item in the expression
>>> col("tuples").as_py(tuple)[0]

Parameters

type (Type) – type of each item in the expression

Returns

A special Expression that records any method calls that a user runs on it, applying the method call to each item in the expression.

Return type

AsPyExpression