Python中的for循环,codecademy

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for  --loop

for number in list:
#do

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start_list = [5, 3, 1, 2, 4] square_list = [] for n in start_list:     square_list.append(n ** 2) square_list.sort() print square_list

list = array

dictionary = hash

dictionary = {'key1' : 1, 'key2' : 2 , 'key3' : 3}
dictionary for

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webster = {     "Aardvark" : "A star of a popular children's cartoon show.",     "Baa" : "The sound a goat makes.",     "Carpet": "Goes on the floor.",     "Dab": "A small amount." } for k in webster:     print webster[k]       #A star of a popular children's cartoon show. #Goes on the floor. #A small amount. #The sound a goat makes.

remove的用法(删除特定元素)

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a = ['gg','tt','ty'] a.remove('gg') print a #['tt','ty']

del的用法（删除index）

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a = ['gg','tt','ty'] del a[1] print a #['tt','ty']