Python–查找范围内而非集合内的数字
给定一组数字和一个范围，任务是编写一个 Python 程序来提取范围内所有不在组内的数字。
示例:
Input : test_set = {6, 4, 2, 7, 9}, low, high = 5, 10
Output : [5, 8]
Explanation : 6, 7 and 9 are present in set, remaining 5, 8 are in output.
Input : test_set = {6, 4, 2, 7, 9}, low, high = 5, 8
Output : [5]
Explanation : 6 and 7 are present in set, remaining 5 is in output.
方法#1:使用循环
在这种情况下，我们迭代范围内的所有元素，并使用条件语句从结果中省略集合中不存在的元素。
Python 3
# Python3 code to demonstrate working of
# Range Numbers not in set
# Using loop
# initializing set
test_set = {6, 4, 2, 7, 9}
# printing original set
print("The original set is : " + str(test_set))
# initializing range
low, high = 5, 10
res = []
for ele in range(low, high):
# getting elements not in set
if ele not in test_set:
res.append(ele)
# printing result
print("Elements not in set : " + str(res))
输出:
The original set is : {2, 4, 6, 7, 9}
Elements not in set : [5, 8]
方法 2:使用“-”运算符
在本例中，我们使用“-”运算符执行通过集合元素从范围中获取差异的任务。
Python 3
# Python3 code to demonstrate working of
# Range Numbers not in set
# Using "-" operator
# initializing set
test_set = {6, 4, 2, 7, 9}
# printing original set
print("The original set is : " + str(test_set))
# initializing range
low, high = 5, 10
# using "-" operator to get difference
res = list(set(range(low, high)) - test_set)
# printing result
print("Elements not in set : " + str(res))
输出:
The original set is : {2, 4, 6, 7, 9}
Elements not in set : [8, 5]
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