pythonのリスト、辞書と繰り返し処理など

pythonのリストと辞書機能について忘れないように備忘録

●リスト

・リストの追加

appendを使用

例：foods = ["apple","banana","grape"]

        foods.append("orange")

        print(foods)

       >>>foods = ["apple","banana","grape","orange"]

・繰り返し処理

例：foods = ["apple","banana","grape"]

        for food in foods:

            print(food)

●辞書

・値の更新

foods = {"a":"apple","b":"banana","c":"grape"}

foods["a"] = "orange"

>>> {"a":"orange","b":"banana","c":"grape"}

・値の追加

foods = {"a":"apple","b":"banana","c":"grape"}

foods["d"] = "orange"

>>> {"a":"orange","b":"banana","c":"grape","d":"orange"}

●while文

〜の間繰り返すという条件処理

例：

x=1

while X <= 100:

     print(x)

     x += 1

結果

1 2 3 4 .... 100

●break

繰り返し処理の途中で強制的に終了する

numbers = [1,2,3,4,5,6]

for number in numbers

     print(number)

     if number == 3:

        break

結果

1  2  3

●continue

条件の処理をスキップする

numbers = [1,2,3,4,5,6]

for number in numbers

     print(number)

     if number%2 == 0:

        continue

     print(number)

結果

1  3  5

他にも様々なものがある為、随時覚えていく