Python筆記 Set List Dictionary

集合 Set:

fruit = set(['apple','banana','tomato'])

vegetable = set (['carrot','tomato'])

print fruit | vegetable

print fruit - vegetable

print fruit & vegetable

print fruit ^ vegetable

set(['tomato', 'carrot', 'apple', 'banana'])

set(['apple', 'banana'])

set(['tomato'])

set(['carrot', 'apple', 'banana'])

List:

names = ['maca','Maca','Tony','Grace','Maca']

print names

print names.count('Maca')

names.sort()

print names

names.reverse()

print names

names.remove('Maca')

print names

['maca', 'Maca', 'Tony', 'Grace', 'Maca']

2

['Grace', 'Maca', 'Maca', 'Tony', 'maca']

['maca', 'Tony', 'Maca', 'Maca', 'Grace']

['maca', 'Tony', 'Maca', 'Grace']






Dictionary

di = {1:"HAHA",2:"LALA",3:"HOHO"}

print di[1]

di[1] = "MIMI"

print di[1]

di["A"] = "HEHE"

print di

print "-----------------------------------------------------"

print di.keys()

print di.values()

print "-----------------------------------------------------"

print di.pop("A")

print di

del di[2]

print di

HAHA

MIMI

{'A': 'HEHE', 1: 'MIMI', 2: 'LALA', 3: 'HOHO'}

-----------------------------------------------------

['A', 1, 2, 3]

['HEHE', 'MIMI', 'LALA', 'HOHO']

-----------------------------------------------------

HEHE

{1: 'MIMI', 2: 'LALA', 3: 'HOHO'}

{1: 'MIMI', 3: 'HOHO'}