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import numpy as np
from functools import partial
from six.moves import map, zip
def multi_apply(func, *args, **kwargs):
"""Apply function to a list of arguments.
Note:
This function applies the ``func`` to multiple inputs and
map the multiple outputs of the ``func`` into different
list. Each list contains the same type of outputs corresponding
to different inputs.
Args:
func (Function): A function that will be applied to a list of
arguments
Returns:
tuple(list): A tuple containing multiple list, each list contains \
a kind of returned results by the function
"""
pfunc = partial(func, **kwargs) if kwargs else func
map_results = map(pfunc, *args)
return tuple(map(list, zip(*map_results)))
def mask2box(mask):
ys, xs = np.where(mask)
y0, y1 = ys.min(), ys.max()
x0, x1 = xs.min(), xs.max()
return x0, y0, x1, y1
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