As modified single batch modification of class variables

! # Python 
# - * - Coding: UTF-. 8 - * - 
# Objective: batch processing when the client calls a single sdk Example 

# Reference: 
# { 
# the Python singleton pattern (the Singleton) N kinds achieved - almost known 
https://zhuanlan.zhihu.com/p/37534850 # 

# design patterns (Python) - singleton - Jane book 
# https://www.jianshu.com/p/ec6589e02e2f 

# PythonDecoratorLibrary - Python Wiki 
# HTTPS: / /wiki.python.org/moin/PythonDecoratorLibrary 

# 3. the Data Model - Python 3.7.3 Documentation 
# https://docs.python.org/3/reference/datamodel.html#object.__new__ 
# 
#} 
# Note: 
# thread-safe 

class SdkSingletonLoger (Object): 
    __instance = None 
    # store batch queues FIFO the FIFO 
    queue = [] 
    QueueLength = None

    def __new__(cls, *args, **kwargs):
        if cls.__instance is None:
            cls.__instance = object.__new__(cls, *args, **kwargs)
        if cls.queueLength is None:
            cls.queueLength = 50
        if len(cls.queue) >= cls.queueLength:
            print "batchHandler"
        print len(cls.queue)
        print cls.queueLength
        return cls.__instance


i = 0

t = (i, 333, {})
i += 1
s1 = SdkSingletonLoger()
s1.queue.append(t)
# s1.queueLength = 2
s1.__class__.queueLength = 2
t = (i, 333, {})
i += 1
s2 = SdkSingletonLoger()
s2.queue.append(t)

t = (i, 333, {})
i += 1
s3 = SdkSingletonLoger()
s3.queue.append(t)

t = (i, 333, {})
i += 1
s4 = SdkSingletonLoger()
s4.queue.append(t)

dd = 9

0
50
1
2
batchHandler
2
2
batchHandler
3
2

! # Python 
# - * - Coding: UTF-. 8 - * - 
# Objective: batch processing when the client calls a single sdk Example 

# Reference: 
# { 
# the Python singleton pattern (the Singleton) N kinds achieved - almost known 
https://zhuanlan.zhihu.com/p/37534850 # 

# design patterns (Python) - singleton - Jane book 
# https://www.jianshu.com/p/ec6589e02e2f 

# PythonDecoratorLibrary - Python Wiki 
# HTTPS: / /wiki.python.org/moin/PythonDecoratorLibrary 

# 3. the Data Model - Python 3.7.3 Documentation 
# https://docs.python.org/3/reference/datamodel.html#object.__new__ 
# 
#} 
# Note: 
# thread-safe 

class SdkSingletonLoger (Object): 
    __instance = None 
    # store batch queues FIFO the FIFO 
    queue = [] 
    QueueLength = None

    def __new__(cls, *args, **kwargs):
        if cls.__instance is None:
            cls.__instance = object.__new__(cls, *args, **kwargs)
        if cls.queueLength is None:
            cls.queueLength = 50
        if len(cls.queue) >= cls.queueLength:
            print "batchHandler"
        print len(cls.queue)
        print cls.queueLength
        return cls.__instance


i = 0

t = (i, 333, {})
i += 1
s1 = SdkSingletonLoger()
s1.queue.append(t)
s1.queueLength = 2
# s1.__class__.queueLength = 2
t = (i, 333, {})
i += 1
s2 = SdkSingletonLoger()
s2.queue.append(t)

t = (i, 333, {})
i += 1
s3 = SdkSingletonLoger()
s3.queue.append(t)

t = (i, 333, {})
i += 1
s4 = SdkSingletonLoger()
s4.queue.append(t)

dd = 9

0
50
1
50
2
50
3
50

Python 2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)] on win32

As modified single batch modification of class variables

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