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(base_dir) from conf import userdb_setclass Ftp_server (socketserver. baseRequestHandler): user_home_dir = ''def auth (self, * args ): ''' authentication username and password ''' pai_dic = args [0] username = pai_dic ["username"] password = pai_dic ["password"] f = open (Userdb_set.userdb_set (), 'r') user_info = json. load (f) if username in user_info.keys (): if password = user_info [username]: self. request. send ('0 '. encode () OS. chdir ('/home/% s' % username) self. user_home_dir = OS.

Python is a simple implementation of reading and writing json files, JSON (JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of ECMAScript. JSON uses a completely language-independent text format, but it also uses a habit similar to the C language family (including C, C ++, Java, JavaScript, Perl, Python, and so on ). These features make JSON an ideal data exchange language. Easy to read and write, and easy to parse and generate by machines (generally use

, ' C ': 456, ' A ':123}>>> print (' Data: ', repr (data)) data: {' C ': 456, ' a ': 123, ' B ': 789} gt;>> print (' repr (data) : ', Len (repr (data)) repr (data) : 30>>> print (' Dumps (data) : ', Len (json.dumps (data))) dumps (data) : 30>>> print (' Dumps (data, indent=4) : ', Len (json.dumps (data, Indent = 4))

First, briefThe data we write in the file is only a string, but what if we want to save the memory data object to the hard disk? Here's to say serialization: JSON PickleSecond, JSON serialization1. Serialization of dumps and loads deserializationSerialization of Dumps ()ImportJson#Importing JSON modulesInfo= { 'name':"Seven", " Age": 32} with open ("Test.txt","W") as F:#write in normal modedata = Jso

Use of the mysqldump command 1. Export all libraries System command Line Mysqldump-uusername-ppassword--all-databases > All.sql 2. Import all libraries MySQL command line Mysql>source All.sql; 3. Export some libraries System command Line Mysqldump-uusername-ppassword--databases db1 DB2 > Db1db2.sql 4. Import some libraries MySQL command line Mysql>source Db1db2.sql; 5. Import a library System command Line Mysql-uusername-ppassword DB1 or MySQL command line Mysql>source Db1.sql;

PDB are overwritten without ignoring the useful information. However, if you have a large number of PDB, and just one of them hang, then this time leads to collect a lot of irrelevant data. With this idea, please pay every effort to identify which database hang, and collect information in that hang database. A. Dumps and tracesHanganalyze and SystemState dumps Hanganalyze and systemstate

--add-drop--database adds a drop DATABASE statement before each CREATE DATABASE statement. --add-drop-tables adds a drop TABLE statement before each CREATE TABLE statement. --add-locking uses the lock tables and unlock tables statements to refer to each table dump. Reload the dump file when it is inserted faster. --all--database,-a dumps all tables in all databases. In the same way that you use the---database option, name all databases on the command

JSON (JavaScript Object Notation) is a lightweight data interchange format. It is based on a subset of ECMAScript. JSON takes a completely language-independent text format, but also uses a similar idiom to the C language family (c, C + +, Java, JavaScript, Perl, Python, and so on). These features make JSON an ideal data exchange language. Easy to read and write, but also easy to machine parse and generate (typically used to improve network transfer rates). JSON is made up of lists and dict, res

pickle module and its homogeneous module cpickle provide pickle support to Python. The latter is encoded in C, it has better performance, and for most applications it is recommended to use this module. We will continue to discuss pickle, but the example in this article is actually taking advantage of Cpickle. Since most of these examples are to be displayed with a Python shell, first show how to import Cpickle and reference it as pickle:Copy the Code code as follows: >>> Import Cpickle as Pickl

The encoding and decoding methods of json data in Python are described in detail. This document describes how to encode and decode json data in Python. We will share this with you for your reference. The details are as follows: Python has built-in json data format processing methods since version 2.6. 1. Data Encoding in json format In python, The json data format is encoded using the json. dumps method. #! /Usr/bin/env python # coding = utf8import js

Python3 implements ftp service functions (client) and python3ftp The example in this article shares with you the code for implementing ftp service functions in python3 for your reference. The specific content is as follows: Client main code: # Author by Andy # _ * _ coding: UTF-8 _ * _ ''' This program is used to create an ftp client ''' import socket, OS, json, time, hashlib, sysclass Ftp_client (object): def _ init _ (self): self. client = socket. socket () def help (self): msg = '''useage: ls

needed. In the Lib under the installation directory, see the two packages (Click here to read the source code carefully, there will be more gains,) as shown in the following article: Python and later versions support Json encoding and decoding, and most built-in python types and Json conversion. The simplest example is as follows: >>> import json>>> data = {"spam" : "foo", "parrot" : 42}>>> in_json = json.dumps(data) # Encode the data>>> in_json'{"parrot": 42, "spam": "foo"}'>>> json.loads(in_

Analyzes the Java heap. This command is experimental and unsupported.SynopsisJhat[ Options ] Heap-dump-fileOptions The command-line options. See Options. Heap-dump-file Java binary heap dump file to is browsed. For a dump file that contains multiple heap dumps, you can specify which dump in the file by appending to the # file n Ame, for example, myfile.hprof#3 . DescriptionThe jhat command parses

After tornado's coroutine was released, the coroutine concept was enhanced. in asynchronous programming, the original gen. engine was replaced and changed to the current gen. coroutine. The decorator was originally designed to simplify asynchronous programming in tornado. Avoid writing callback functions to make development more in line with normal logic thinking. A simple example is as follows: Class MaindHandler (web. RequestHandler ): @ Asynchronous @ Gen. coroutine Def post (self ): Client

This article mainly introduces the use of JSON in Python. the sample code is based on Python2.x. For more information, see JSON advanced Python dict objects can be directly serialized into JSON {}. However, many times we prefer to use class to represent objects, such as defining the Student class, and then serialize: import jsonclass Student(object): def __init__(self, name, age, score): self.name = name self.age = age self.score = scores = Student('Bob', 20, 88)print(json.dumps(s))

Serialized json, pickle, and jsonpickle in python What is Json: JSON (JavaScript Object Notation) is a lightweight data exchange format. Easy for reading and writing, and easy for machine parsing and generation. Json uses a completely language-independent text format, but it also uses family habits similar to C language (such as C, C ++, C #, Java, JavaScript, Perl, Python, etc ), these features make Json an ideal exchange language. Generally, it processes simple data objects and interacts with

-8-*-# open the file = open ("/sys/class/thermal/thermal_zone0/Temp ") # Read the result and convert it to a floating point temp = float (file. read ()/1000 # close the file. close () # print "Temp: %. 1f "% TempEnter the following command in the yeelink-temp.py directory to execute the script # Execute scripts Python yeelink-temp.py # Execution return Temp: 49.2 3. Use the request to upload data to yeelinkContinue to modify yeelink-temp.py ! #/Usr/bin/Python #-*-coding: UTF-8-*-import request

The Dalvik Virtual Machine supports garbage collection, but this does not mean you don't have to worry about memory management. Pay special attention to the memory usage of mobile devices. The memory space on the mobile devices is limited. In this article, let's take a look at how some of the memory profiling tools in the android SDK help us trim the memory usage of the application. Some memory usage problems are obvious. For example, if the app has a memory leak every time the user touches the

SRV * D:/wdbgzone/websymbols * http://msdl.microsoft.com/download/symbols;d:/wdbgzone/pdb Debugdiag: Tools --> options and settings ......Symbol search path for analysisSRV * D:/wdbgzone/websymbols * http://msdl.microsoft.com/download/symbols;d:/wdbgzone/pdb Windbg: file --> symbol pathSRV * D:/wdbgzone/websymbols * http://msdl.microsoft.com/download/symbols;d:/wdbgzone/pdb Environment variable (CMD set can detect the result) _ Nt_symbol_pathSRV * D:/wdbgzone/websymbols * http://msdl.

certain amount of performance consumption, so proper sequencing is very important.The indent parameter is the indentation meaning, which can make the data storage format more elegant.Data1 = {' B ': 789, ' C ': 456, ' a ': 123}d1 = Json.dumps (data1,sort_keys=true,indent=4) Print D1Output: { "a": 123, "B": 789, "C": 456}After the output is formatted, it becomes more readable, but it is populated by adding some redundant blanks. JSON is mainly as a data communication format exists, and