Two modules for serializationJSON: Used to convert between string and Python data typesPickle: Converting between Python-specific types and Python data typesJSON offers four features: Dumps,dump,loads,loadPickle offers four functions: Dumps,dump,loads,loadWhat type of data can pickle store?
All Python-supported native types: Boolean, Integer, floating-point, plural, string, byte, None.
Lists, t
(' Shuaige ') print hash.hexdigest ()------------------------------------- ---------------------------------------------->>> hash = hashlib.md5 (' 898oafs09f ') # Add the custom information here and then encrypt >>> hash.update (' Shuaige ') >>> print hash.hexdigest () 6d1233c4e14a52379c6bc7a045411dc3There are also powerful encryption methods: Python also has an HMAC module that internally creates key and content for us to process and then encryptImport Hmach = hmac.new (' Shuaige ') h.update
:",data_stringOutput:DATA: [{‘a‘:‘A‘,‘c‘:3.0,‘b‘:(2,4)}] #python的dict类型的数据是没有顺序存储的JSON: [{"a":"A","c":3.0,"b":[2,4]}] The output of JSON is similar to data, except for some subtle changes such as Python's tuple type becoming an array of JSON, the code conversion rules for Python to JSON are:The Json.loads method handles decoding (decoding) conversions of simple data typesimport jsondata = [{‘a‘:"A",‘b‘:(2,4),‘c‘:3.0}] #list对象data_string = json.dumps(data)print "ENCODED:",data_stringdecoded = j
to do during design. Obviously, you know something about it, but a special detail may depend on the information that can be obtained later. "Later" itself has two types: (a) when the application uses the library module; (B) when running, when a certain situation exists. This class is very similar to what we call "Aspect-Oriented Programming (Aspect-Oriented Programming, AOP )". We will show an example that we think is very chic:Listing 7. metadata configuration during running
% cat dump.py#!/u
standalone Mat version (version 1.0.1), which is downloaded from the mat site.If you use ADT (which contains DDMS plugins) and also install the mat in eclipse, click "Dump HPROF" The button will automatically convert (with Hprof-conv) and open the converted Hprof file in eclipse (it actually opens with a mat).Analyze heap dumps with matStart the mat and load the Hprof file we just generated. Mat is a powerful tool to tell that all of its features are
API Reference
Helper functions
Object Str_get_html (String $content) creates a DOM object from a string.
Object File_get_html (String $filename) creates a DOM object from a file or a URL.
DOM Methods Properties
Stringplaintext Returns the contents extracted from HTML.
Voidclear () Clean up memory.
Voidload (String $content) Load contents from a string.
Stringsave ([string $filename]) dumps the internal DOM tree back into a string. If the $filename is
= json.dumps(data)print "JSON:",data_stringOutput:DATA: [{‘a‘:‘A‘,‘c‘:3.0,‘b‘:(2,4)}] #python的dict类型的数据是没有顺序存储的JSON: [{"a":"A","c":3.0,"b":[2,4]}] The output of JSON is similar to data, except for some subtle changes such as Python's tuple type becoming an array of JSON, the code conversion rules for Python to JSON are:The Json.loads method handles decoding (decoding) conversions of simple data typesimport jsondata = [{‘a‘:"A",‘b‘:(2,4),‘c‘:3.0}] #list对象data_string = json.dumps(data)print "EN
Here we will talk about the code of the Process part of Firefly's "Dark World" fragment merging. This is mainly the part of message parsing. Let's get the code and the code path is APP/GAME/gatenodeapp/compound. py.
# Coding: utf8
'''
Created on 2013-3-21
Product Merging
@ Author: Lan (www.9miao.com)
'''
From app. Game. gatenodeservice import remoteservicehandle
Import JSON
# Import function logic processing module
From app. Game. appinterface import Compound
@ Remoteservicehandle
Document directory
Problem description
Problem troubleshooting
Problem description
An inadvertent deadlock in the application code can cause a server to hang. for example, a situation in which thread1 is waiting for resource1 and is holding a lock on resource2, while thread2 needs resource2 and is holding the lock on resource1. neither thread can progress.Problem troubleshooting
This application deadlock pattern shocould be used only after doing all the steps in{Pagetracker. _ trackpageview
('mysql: // root: @ 172.30.36.7/ivcs_portal? Charset = utf8') base. metadata. create_all (ENGINE) Session = sessionmaker (autocommit = false, autoflush = false, bind = engine) return sessionfrom sqlalchemy. ext. declarative import declarativemetaclass alchemyencoder (JSON. jsonencoder): def default (self, OBJ): If isinstance (obj. _ class __, declarativemeta): # An sqlalchemy class fields ={} for field in [X for X in Dir (OBJ) if not X. startswith ('_') and X! = 'Metadata']: Data = obj. _ getat
element
* The "Current Position". elements are randomly selected from
* Portion of the list that runs from the first element to the current
* Position, inclusive.
*
* This method runs in linear time. If the specified list does not
* Implement the {@ link randomaccess} interface and is large, this
* Implementation dumps the specified list into an array before shuffling
* It, and dumps the sh
, click "Dump hprof" to automatically perform the conversion (using hprof-Conv) at the same time, the converted hprof file will be opened in eclipse (it is actually opened with Mat ).
Use mat to analyze heap dumps
Start mat and load the hprof file we just generated. MAT is a powerful tool that describes all its features beyond the scope of this article, so I just want to demonstrate a method you can use to detect leaks: histogram view. It displays a l
(json.dumps(result))
Method 2: request parameter
//. Ajax same as the url: "/search/searchLog /? Offset = "+ tmpOffset +" count = "+ pageCount // obtain parameters in the background. View function def searchLog (request): offset = request. GET. get ('offset '); count = request. GET. get ('Count'); // something
POST Usually post is used to submit forms or upload data.
// Front-end jslogConf ={}; // something $. ajax ({type: "POST", url: "/setting/updschema/", data: JSON. stringify (logConf), ype
') print (hash_md5.hexdigest ()) Hash = hashlib. sha512 () hash. update ('admin') print hash. hexdigest () # Although the above encryption algorithm is still very powerful, it has a defect, that is, it can be reversed by Credential stuffing. Therefore, it is necessary to add a custom key to the encryption algorithm and then encrypt it. Add custom key for encryption import hashlibhash = hashlib. md5 ('898oafs09f') hash. update ('admin') print hash. hexdigest () ultra-core encryption-continue to e
#zip_obj=zipfile. ZipFile (R "C:\day4_copy.zip", "a") # ' R ' means opening an existing read-only zip file, ' W ' means emptying and opening a write-only zip file, or creating a write-only zip file; ' A ' means opening a zip file and adding content. #zip_obj.write ("Test_copy") #将test_copy文件写进压缩文件 #zip_obj.close () #z=zipfile. ZipFile ("C:\day5_copy.zip", "R") #解压zip文档中的所有文件到当前目录 #z.extractall () #z.close () #import tarfile# all the files under the workspace, package a tar file, and provide a wa
an object.How do---serialize?Two modules are available in Python for serialization. Are pickle and JSON, respectively.PicklePickle is a unique serialization module in Python, so-called exclusive, which means that it cannot interact with the serialization of other programming languages because pickle converts the data object to bytes>>> Import pickle>>> d=[1,2,3,4]>>> pickle.dumps (d) B ' \x80\x03]q\x00 (k\x01k\x02k\x03k\ x04e. ' >>> type (Pickle.dumps (d)) The Pickle module provides four functi
as a valid expression to evaluate and return the results of the calculation.but! Powerful functions are at the cost. Security is one of its biggest drawbacks.Imagine that if we read from a file is not a data structure, but a "delete the file" similar to the destructive statement, then the consequences are not set to imagine.The use of eval is a risk.Therefore, we do not recommend using the Eval method for deserialization (converting STR to a data structure in Python)‘‘‘# Purpose of serializatio
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