Returns the difference between two iterables.
Create a set
from b
, then use list comprehension on a
to only keep values not contained in the previously created set, _b
.
代码实现
def difference(a, b):
_b = set(b)
return [item for item in a if item not in _b]
使用样例
difference([1, 2, 3], [1, 2, 4]) # [3]