dask.bag.Bag.pluck

dask.bag.Bag.pluck¶

Bag.pluck(key, default=_NoDefault.no_default)[源代码]¶

从集合中的所有元组/字典中选择项目。

>>> import dask.bag as db
>>> b = db.from_sequence([{'name': 'Alice', 'credits': [1, 2, 3]},
...                       {'name': 'Bob',   'credits': [10, 20]}])
>>> list(b.pluck('name'))
['Alice', 'Bob']
>>> list(b.pluck('credits').pluck(0))
[1, 10]

dask.bag.Bag.persist

dask.bag.Bag.product