fish_object 面向对象函数包

fish_object 包含的是一些和面向对象相关的函数和类。

class fish_object.DeserializeInstance(obj_dict)

字典对象反序列化

Param:

• obj_dict: (dict) 对象序列化字典

Returns:

• obj: (object) 对象

举例如下:

print('--- DeserializeInstance demo ---')
temp_dict = {'user': {'name': {'last_name': 'zhang', 'first_name': 'san'}, 'address': 'Beijing'}}
new_obj = DeserializeInstance(temp_dict)
print('last_name is: ', new_obj.user.name.last_name)
print('first_name is: ', new_obj.user.name.first_name)
print('address is: ', new_obj.user.address)
print('---')

执行结果:

--- DeserializeInstance demo ---
last_name is:  zhang
first_name is:  san
address is:  Beijing
---

class fish_object.SingleTon

申明一个单例类，可以作为需要单例类时候申明用的父类

Param:无 Returns:无

举例如下:

print('--- class singleton demo ---')
t1 = SingleTon()
t1.x = 2
print('t1.x:', t1.x)

t2 = SingleTon()

t1.x += 1

print('t1.x:', t1.x)
print('t2.x:', t2.x)
print('---')

执行结果:

--- class singleton demo ---
t1.x: 2
t1.x: 3
t2.x: 3
---

fish_object.serialize_instance(obj)

对象序列化

Param:

• obj: (object) 对象实例

Returns:

• obj_dict: (dict) 对象序列化字典

举例如下:

print('--- serialize_instance demo ---')
# 定义两个对象
class Obj(object):
    def __init__(self, a, b):
        self.a = a
        self.b = b

class ObjB(object):
    def __init__(self, x, y):
        self.x = x
        self.y = y

# 对象序列化
b = ObjB('string', [item for item in range(10)])
obj_ = Obj(1, b)
print(serialize_instance(obj_))
print('---')

执行结果:

--- serialize_instance demo ---
{'__classname__': 'Obj', 'a': 1,
'b': {'__classname__': 'ObjB', 'x': 'string', 'y': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}}
---

fish_object.sort_objs_by_attr(objs, key, reverse=False)

对原生不支持比较操作的对象根据属性排序

Param:

• objs: (list) 需要排序的对象列表
• key: (string) 需要进行排序的对象属性
• reverse: (bool) 排序结果是否进行反转，默认为 False，不进行反转

Returns:

• result: (list) 排序后的对象列表

举例如下:

print('--- sorted_objs_by_attr demo---')


class User(object):
    def __init__(self, user_id):
        self.user_id = user_id


users = [User(23), User(3), User(99)]
result = sorted_objs_by_attr(users, key='user_id')
reverse_result = sorted_objs_by_attr(users, key='user_id', reverse=True)
print([item.user_id for item in result])
print([item.user_id for item in reverse_result])
print('---')

执行结果:

--- sorted_objs_by_attr demo---
[3, 23, 99]
[99, 23, 3]
---