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学ぶ Lists (2/3) | Other data types
Learn Python from Scratch
セクション 5.  2
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bookLists (2/3)

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There are several operations available for manipulating lists, same as for string, such as:

  • len() - length of list (i.e. number of elements);
  • list1 + list2 - concatenation (both must be lists);
  • list1 * n - n copies of list1;
  • list.append(x) - add x (one element!) to the end of list (x can not be list) - this one rewrites your list;
  • list.extend((x, y, ...)) - add x,y, ... to the end of list - also rewrites your list;
  • list.copy() - creates a copy of your list;
  • list.count(x) - counts number of x in list.

For example, we can modify a bit our list with several more countries.

12345678910
countries = ["USA", 9629091, "Canada", 9984670, "Germany", 357114] # list with new countries countries_new = ["Brazil", 8515767, "India", 3166391] # add new data (list) to our list using concatenation print(countries + countries_new) # using list method countries.extend(("Brazil", 8515767, "India", 3166391)) print(countries)
copy
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Modify your last list with new data. Experiment with both methods and print the result.

NameAge
John41
Michelle35

解答

Switch to desktop実践的な練習のためにデスクトップに切り替える下記のオプションのいずれかを利用して、現在の場所から続行する
すべて明確でしたか?

どのように改善できますか?

フィードバックありがとうございます!

セクション 5.  2
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