Installation

On any platform, use pip or conda.

pip install slicerator

conda install -c conda-forge slicerator

Example

from slicerator import Slicerator
@Slicerator.from_class
class MyLazyLoader:
    def __getitem__(self, i):
        # this method will be wrapped by Slicerator, so that it accepts slices,
        # lists of integers, or boolean masks. Code below will only be executed
        # when an integer is used.
        # load thing number i
        return thing
    def __len__(self):
        # do stuff
        return number_of_things
# Demo:
>>> a = MyLazyLoader()
>>> s1 = a[::2]  # no data is loaded yet
>>> s2 = s1[1:]  # no data is loaded yet
>>> some_data = s2[0]