Python Set difference() 函数用法
2023-09-17 22:24:34
set.difference()
方法返回新集,其中包含不在作为参数传递的其他集中的唯一元素。
语法:
set.difference(*other_set)
参数:
other_set:(必需)一个或多个以逗号分隔的集合。
返回值:
返回一个新集。
下面的示例演示 set.difference()
方法。
nums1 = {1, 2, 2, 3, 4, 5}
nums2 = {4, 5, 6, 7, 8, 8}
nums3 = nums1.difference(nums2)
nums4 = nums2.difference(nums1)
print("nums1 - nums2: ", nums3)
print("nums2 - nums1: ", nums4)
输出:
nums1 - nums2: {1, 2, 3}
nums2 - nums1: {8, 6, 7}
下面列出了两个字符串集之间的差异。
cities = {'Bangalore','Mumbai','New York','Honk Kong','Chicago'}
indianCities = {'Bangalore','Mumbai'}
nonindiancities = cities.difference(indianCities)
print("Non-Indian Cities: ", nonindiancities)
输出:
Non-Indian Cities: {'Honk Kong', 'Chicago', 'New York'}
传递多个集合(Passing Multiple Sets)
您还可以在 difference()
方法中指定多个集,如下所示。
nums1 = {1, 2, 2, 3, 4, 5}
nums2 = {4, 5, 6, 7, 8, 8}
nums3 = { 3, 5, 8, 9, 10}
diff = nums1.difference(nums2, nums3)
print(diff)
输出:
{1, 2}
使用 - 运算符(Using the - Operator)
-
运算符也可用于计算两组的差值。
nums1 = {1, 2, 2, 3, 4, 5}
nums2 = {4, 5, 6, 7, 8, 8}
nums3 = { 3, 5, 8, 9, 10}
diff = nums1 - nums2 - nums3
print('Numbers Differences: ', diff)
cities = {'Bangalore','Mumbai','New York','Honk Kong','Chicago'}
indianCities = {'Bangalore','Mumbai'}
nonindiancities = cities - indianCities
print("Non-Indian Cities: ", nonindiancities)
输出:
Numbers Differences: {1, 2}
Non-Indian Cities: {'Honk Kong', 'Chicago', 'New York'}
本文内容总结: