"""
定义和使用集合
Version: 1.0.0
Author: Catherine
Data: 2019-03-11
"""
def main():
# set1 = {1, 2, 3, 3, 3, 2}
# print(set1)
# print(len(set1))
#
# set2 = set(range(1, 10))
# print(set2)
#
# set1.add(4)
# set1.add(5)
# print(set1)
#
# set2.update([11, 12])
# print(set2)
#
# set2.discard(5)
# print(set2)
#
# if 4 in set2:
# set2.remove(4)
# print(set2)
#
# for elem in set2:
# print(elem ** 2, end=' ')
# print()
set3 = set((1, 2, 3, 3, 2, 1))
print(set3)
print(set3.pop())
print(set3)
if __name__ == "__main__":
main()
集合1-python3
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