1 >>> dic1 = {'key1' : 'a','key2' : 'b'} 2 >>> dic1.get('key1') #取字典值，没取到默认返回None，也可指定 3 'a' 4 >>> dic1.get('key3') 5 >>> dic1.items() 6 dict_items([('key2', 'b'), ('key1', 'a')]) #返回元组列表 7 >>> list(dic1.items()) 8 [('key2', 'b'), ('key1', 'a')] 9 >>> dic1.keys() #返回keys列表10 dict_keys(['key2', 'key1'])11 >>> dic1.values() #返回值列表12 dict_values(['b', 'a'])13 >>> dic2 = dic1.copy() #浅复制14 >>> dic215 {'key2': 'b', 'key1': 'a'}16 >>> dic1['key3'] = 'c' #赋值(修改)17 >>> dic118 {'key2': 'b', 'key1': 'a', 'key3': 'c'}19 >>> dic1.pop('key1') #删除指定的key20 'a'21 >>> dic122 {'key2': 'b', 'key3': 'c'}23 >>> dic1.get('key1','a') #取值，没有返回'a'24 'a'25 >>> dic126 {'key2': 'b', 'key3': 'c'}27 >>> dic1.setdefault('key1','a') #设置默认（貌似没什么用）28 'a'29 >>> dic130 {'key2': 'b', 'key1': 'a', 'key3': 'c'}31 >>> dic3 = {'name':'update'}32 >>> dic1.update(dic3) #更新33 >>> dic1 34 {'key2': 'b', 'name': 'update', 'key1': 'a', 'key3': 'c'}35 >>> del dic3 #删除36 >>> dic137 {'key2': 'b', 'name': 'update', 'key1': 'a', 'key3': 'c'}38 >>> len(dic1) #长度39 4
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