python删除集合(set)元素时，remove和discard的区别_discard和remove函数都可以删除集合中的元素

删除集合元素remove和discard的区别

setA = set('Hello, World!')
setA.remove("X")
help(set.remove)
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Traceback (most recent call last):
File “<pyshell#29>”, line 2, in
setA.remove(“x”)
KeyError: ‘x’

Help on method_descriptor:

remove(…)
Remove an element from a set; it must be a member.
If the element is not a member, raise a KeyError.
集合元素不存在，提示错误（KeyError）

setA = set('Hello, World!')
setA.discard("X")
help(set.discard)
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无错误信息输出

Help on method_descriptor:

discard(…)
Remove an element from a set if it is a member.
If the element is not a member, do nothing.集合元素不存在，不显示任何信息