create(key='a', value={'k1': 'v1'}) >>> KV.get(KV.key == 'a').value {'k1': 'v1'} We can access specific parts of the JSON data using dictionary lookups: >>> KV.get(KV.value['k1'] == 'v1').key 'a' using the update() method: >>> KV.update(value=KV.value.update({'k1': 'v1-x', 'k2': 'v2'})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1-x', 'k2': 'v2'} We can also set individual parts of the the JSON data using the set() method: >>> KV.update(value=KV.value['k1'].set('v1')).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1', 'k2': 'v2'} The set() method can also be used with objects,

create(key='a', value={'k1': 'v1'}) >>> KV.get(KV.key == 'a').value {'k1': 'v1'} We can access specific parts of the JSON data using dictionary lookups: >>> KV.get(KV.value['k1'] == 'v1').key 'a' using the update() method: >>> KV.update(value=KV.value.update({'k1': 'v1-x', 'k2': 'v2'})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1-x', 'k2': 'v2'} We can also set individual parts of the the JSON data using the set() method: >>> KV.update(value=KV.value['k1'].set('v1')).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1', 'k2': 'v2'} The set() method can also be used with objects, in

create(key='a', value={'k1': 'v1'}) >>> KV.get(KV.key == 'a').value {'k1': 'v1'} We can access specific parts of the JSON data using dictionary lookups: >>> KV.get(KV.value['k1'] == 'v1').key 'a' using the update() method. Note that “k1=v1” is preserved: >>> KV.update(value=KV.value.update({'k2': 'v2', 'k3': 'v3'})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1', 'k2': 'v2', 'k3': 'v3'} update the value of “k1” and remove “k3” (“k2” will not be modified): >>> KV.update(value=KV.value.update({'k1': 'v1-x', 'k3': None})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1-x', 'k2': 'v2'}

create(key='a', value={'k1': 'v1'}) >>> KV.get(KV.key == 'a').value {'k1': 'v1'} We can access specific parts of the JSON data using dictionary lookups: >>> KV.get(KV.value['k1'] == 'v1').key 'a' using the update() method. Note that “k1=v1” is preserved: >>> KV.update(value=KV.value.update({'k2': 'v2', 'k3': 'v3'})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1', 'k2': 'v2', 'k3': 'v3'} We update the value of “k1” and remove “k3” (“k2” will not be modified): >>> KV.update(value=KV.value.update({'k1': 'v1-x', 'k3': None})).execute() 1 >>> KV.get(KV.key == 'a').value {'k1': 'v1-x', 'k2': 'v2'}

# ('Post 3', []) insert(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments .execute()) replace(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments .execute()) set(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments

[]) insert(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments execute()) replace(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments execute()) set(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments

[]) insert(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments execute()) replace(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments execute()) set(*pairs, **data) Parameters • pairs – A flat list consisting of key, value pairs. E.g., k1, v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. • data – keyword arguments

# ('Post 3', []) insert(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSON path. data – keyword arguments mapping .execute()) replace(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSON path. data – keyword arguments mapping .execute()) set(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSON path. data – keyword arguments mapping

# ('Post 3', []) insert(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments .execute()) replace(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments .execute()) set(*pairs, **data) pairs – A flat list consisting of key, value pairs. E.g., k1 v1, k2, v2, k3, v3. The key may be a simple string or a JSONPath instance. data – keyword arguments

★遍历字典dic�onary ①遍历key dictx = {"k1": "v1", "k2": "v2", "k3": "v3"} for key in dictx.keys(): print(key, "-------->", dictx[key]) ②遍历value dictx = {"k1": "v1", "k2": "v2", "k3": "v3"} for value value in dictx.values(): print(value) ③遍历item dictx = {"k1": "v1", "k2": "v2", "k3": "v3"} for k, v in dictx.items(): print(k, "---->", v) ★list/set/dic�onary增删改查操作 ①list数据操作（有序，数值可重复） 组成的list ★pickle序列化模块 序列化是指将内存中的对象 存储到文件中（二进制文件） 反序列化将文件内容读出并生成对象（恢复成对象） import pickle datax = {"k1": "v1", "k2": "v2", "k3": "v3"} datay = ["fdas", "fkldsj", 1323] with open("pk.dat", "wb") as fp: