pickle - Python object serialization  消息队列…

python的pickle是用来序列化对象很方便的工具,但是pickle对传入对象的要求是不能是内部类,也不能是lambda函数. 比如尝试pickle这个内部类: 结果会报错AttributeError: Can't pickle local object. 这个问题可以用第三方库dill来解决: (https://pypi.org/project/dill/) 结果: dill除了可以处理pickle可以处理的标准类型外: 嗯,还是很好用的. (另外python内建库shelve也是用的pi…

公司同事学习自动化新装环境后,run多进程测试用例时出错: multiprocessing.pool.MaybeEncodingError: Error sending result: ’<appium.webdriver.webdriver.WebDriver (session=“261019ae-3776-4a78-aa2c-b24bb64ec62e”)>’. Reason: ’AttributeError(“Can’t pickle local object ‘PoolManager._…

关于selenium传参报错问题,用下面是报错信息: Traceback (most recent call last): File "D:/code/read_book/main.py", line 327, in <module> main() File "D:/code/read_book/main.py", line 303, in main read_one.start() File "C:\Users\23914\AppData\L…

Python Object Graphs - objgraph 1.7.2 documentation Python Object Graphs¶ objgraph is a module that lets you visually explore Python object graphs. You'll need graphviz if you want to draw the pretty graphs. I recommend xdot for interactive use. pip…

今天在生产系统中查询产品时,莫名提示错误:maximum recursion depth exceeded while calling a Python object,根据错误日志提示,发现在查询产品时,系统会构造一个domain,查询所有库位的库存量.当仓库较多的时候,构造的这个domain比较长,然后解析这个domain的方法distribute_negate是递归调用,因为递归次数太多,所以就提示错误. 根据源码查看了生成domain的条件,这个部分不太好调整,所以后来直接找了个方法来增加…

2019-10-21 19:01:00 [scrapy.core.engine] INFO: Spider opened2019-10-21 19:01:00 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)2019-10-21 19:01:00 [scrapy.extensions.telnet] INFO: Telnet console l…

先定义两个简单的类: package comm; import java.io.Serializable; import java.util.Date; import java.util.GregorianCalendar; public class Employee implements Serializable{ private static final long serialVersionUID = 8820461656542319555L; private String name; pr…

动态语言的对象属性 既然都是动态语言,自然python和熟知的JavaScript很像,建一个空对象用来存放所有的数据,看看js: var data = {}; data.name = 'CooMark'; data.age = 30; 但是在python中这样却不行,说好的动态属性呢? data = object() data.name = 'CooMark' # AttributeError: 'object' object has no attribute 'name' 但是像下面这样又是…

1. Creating class class className: 'Optional class documentation string' class_suite The class has a documentation string, which can be accessed via ClassName.__doc__. Example: class Employee: 'Common base class for all employees' empCount = 0 def __…