Function deepfirst

dask/array/core.py:5464–5473

First element in a nested list >>> deepfirst([[[1, 2], [3, 4]], [5, 6], [7, 8]]) 1

(seq)

def deepfirst(seq):
    """First element in a nested list

    >>> deepfirst([[[1, 2], [3, 4]], [5, 6], [7, 8]])
    1
    """
    if not isinstance(seq, (list, tuple)):
        return seq
    else:
        return deepfirst(seq[0])


def shapelist(a):