Using lists, dicts, and sets
A Python sequence object, like a list
, is iterable. However, it has some additional features. We'll think of it as a materialized iterable. We've used the tuple()
function in several examples to collect the output of a generator expression or generator function into a single tuple
object. We can also materialize a sequence to create a list
object.
In Python, a list display offers simple syntax to materialize a generator: we just add the []
brackets. This is ubiquitous to the point where the distinction between generator expression and list comprehension is a subtlety of little practical importance.
The following is an example to enumerate the cases:
>>> range(10) range(0, 10) >>> [range(10)] [range(0, 10)] >>> [x for ...
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