del is a statement rather than a method
del member [1]: to delete by the subscript
del member: You can also delete the entire list
remove (): to delete the list elements themselves, rather than by the subscript
member.remove('天天')
pop():
member.pop (): default throws the last element in the list,
name = member.pop (): and can be thrown elements assignment.
member.pop (1): the element can also be deleted by the subscript