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In Python

In Python, you make and use a set with the set() keyword. For example:

  names = set()
  names.add("Michele")
  names.add("Robin")
  names.add("Michele")
  print(names)

And the output will be;

  set(['Michele', 'Robin'])

You can do to a set almost anything you can do to a list (except ask for things like “the third element”). See the Python documentation about sets to get a full list of things you can do to sets.

You can convert from a list to a set and a set to a list pretty easily:

  names = ["Michele", "Robin", "Sara", "Michele"]
  names = set(names)
  names = list(names)
  print(names)

And the result of this will be:

  ['Michele', 'Robin', 'Sara']

14 列出刪除重複項
練習14 和解決方案

編寫一個包含一個列表並返回一個新列表的程序（函數！），該列表包含第一個列表的所有元素減去所有重複項。

附加功能：

編寫兩個不同的函數來執行此操作-一個使用循環並構造一個列表，另一個使用集合。
返回並使用集合進行練習5，然後使用其他函數編寫解決方案。

Features of sets << Previous Next >> 討論區-1