




import pytest

from datasets.utils.sharding import _distribute_shards, _number_of_shards_in_gen_kwargs, _split_gen_kwargs



@pytest.mark.parametrize(
    '''kwargs, expected'''						, [
        ({'''num_shards''': 0, '''max_num_jobs''': 1}, []),
        ({'''num_shards''': 10, '''max_num_jobs''': 1}, [range(10							)]),
        ({'''num_shards''': 10, '''max_num_jobs''': 10}, [range(_snake_case						, i + 1							) for i in range(10							)]),
        ({'''num_shards''': 1, '''max_num_jobs''': 10}, [range(1							)]),
        ({'''num_shards''': 10, '''max_num_jobs''': 3}, [range(0						, 4							), range(4						, 7							), range(7						, 10							)]),
        ({'''num_shards''': 3, '''max_num_jobs''': 10}, [range(0						, 1							), range(1						, 2							), range(2						, 3							)]),
    ]						, )
def       UpperCAmelCase       (     _snake_case						, _snake_case							):
       lowerCAmelCase   =		_distribute_shards(**_snake_case							)
       assert out == expected



@pytest.mark.parametrize(
    '''gen_kwargs, max_num_jobs, expected'''						, [
        ({'''foo''': 0}, 10, [{'''foo''': 0}]),
        ({'''shards''': [0, 1, 2, 3]}, 1, [{'''shards''': [0, 1, 2, 3]}]),
        ({'''shards''': [0, 1, 2, 3]}, 4, [{'''shards''': [0]}, {'''shards''': [1]}, {'''shards''': [2]}, {'''shards''': [3]}]),
        ({'''shards''': [0, 1]}, 4, [{'''shards''': [0]}, {'''shards''': [1]}]),
        ({'''shards''': [0, 1, 2, 3]}, 2, [{'''shards''': [0, 1]}, {'''shards''': [2, 3]}]),
    ]						, )
def       UpperCAmelCase       (     _snake_case						, _snake_case						, _snake_case							):
       lowerCAmelCase   =		_split_gen_kwargs(_snake_case						, _snake_case							)
       assert out == expected



@pytest.mark.parametrize(
    '''gen_kwargs, expected'''						, [
        ({'''foo''': 0}, 1),
        ({'''shards''': [0]}, 1),
        ({'''shards''': [0, 1, 2, 3]}, 4),
        ({'''shards''': [0, 1, 2, 3], '''foo''': 0}, 4),
        ({'''shards''': [0, 1, 2, 3], '''other''': (0, 1)}, 4),
        ({'''shards''': [0, 1, 2, 3], '''shards2''': [0, 1]}, RuntimeError),
    ]						, )
def       UpperCAmelCase       (     _snake_case						, _snake_case							):
       if expected is RuntimeError:
              with pytest.raises(_snake_case							):
                     _number_of_shards_in_gen_kwargs(_snake_case							)
       else:
              lowerCAmelCase   =		_number_of_shards_in_gen_kwargs(_snake_case							)
              assert out == expected









from collections.abc import Sequence



def       UpperCAmelCase       (     _snake_case						, _snake_case = False							):
							if not arr:
														return 0

							lowerCAmelCase   =		0 if allow_empty_subarrays else float('''-inf'''							)
							lowerCAmelCase   =		0.0
							for num in arr:
														lowerCAmelCase   =		max(0 if allow_empty_subarrays else num						, curr_sum + num							)
														lowerCAmelCase   =		max(_snake_case						, _snake_case							)

							return max_sum


if __name__ == "__main__":
		from doctest import testmod

		testmod()

		UpperCAmelCase_						=[-2, 1, -3, 4, -1, 2, 1, -5, 4]
		print(F'''{max_subarray_sum(nums) = }''')



