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For example, the use of thread locks in Python programming and python Programming Lock Python's built-in data structures, such as lists and dictionaries, are thread-safe. However, simple data types, such as integers and floating-point numbers, are not thread-safe. You need to perform operations on these simple data types, you need to use the lock. #!/usr/bin/env

Python uses a regular expression to match the start of a string and print the example. python Regular Expression This example describes how to use a regular expression to match and print a string. We will share this with you for your reference. The details are as follows: Import res = "name = z1hangshan username = ff

+ = Reg *W2 $DW + = Reg *W141 142 #perform a parameter update143W + =-step_size *DW144b + =-step_size *DB145W2 + =-step_size *dW2146B2 + =-step_size *DB2147 #evaluate training set accuracy148Hidden_layer = Np.maximum (0, Np.dot (X, W) +b)149Scores = Np.dot (Hidden_layer, W2) +B2 MaxPredicted_class = Np.argmax (scores, Axis=1)151 Print 'Training accuracy:%.2f'% (Np.mean (Predicted_class = =y)) the #plot the resulting classifier153H = 0.02154X_min, X_max = x[:, 0].min ()-1, x[:, 0].max () + 1

Example of multi-thread HTTP download tool implemented by Python, python download Tool This document describes how to use pythonto compile multi-thread httpdownloads and generate the. exe executable file. Environment: windows/Linux + Python2.7.x Single thread A single thread is introduced before multithreading. The idea of writing a single thread is: 1. parse the

This article mainly introduces how to save a webpage to a local python instance. For more information about how to save a webpage to a local machine, see the following python example. The code is as follows: # Coding = UTF-8_ Auther _ = 'xianbao'Import urllibImport OSDef reporthook (blocks_read, block_size, total_size ):If not blocks_read:Print 'open conne

An interesting example of Python decorators and an exploration of python decorations Miss Liao's tutorial is too advanced to understand. Click to open the link. def deco_functionNeedDoc(func): if func.__doc__ == None : print func, "has no __doc__, it's a bad habit." else: print func, ':', func.__doc__, '.' return func@deco_functionNeedDocd

Python constructs a custom method to beautify the dictionary structure output example, python dictionary Example:Copy codeThe Code is as follows:D = {"root": {"folder2": {"item2": None, "item1": None}, "folder1": {"subfolder1": {"item2 ": none, "item1": None}, "subfolder2": {"item3": None }}}} Beautiful output: Observe the following features:1. the keys of the

Read a blog, very good. Http://www.cnblogs.com/turtle-fly/p/3280519.htmlThe standard output (sys.stdout) corresponds to print (printing), and the standard input (Sys.stdin) corresponds to the input (receive input) operation, and the standard error output and standard output are similar to print (printing).Python's most basic operation-printing:1The effect is to write 1 in the console (command line) to let you see.In fact, his operation can be understood as: the console (command line) as a board,

registrar if they are to be queried. This protection mechanism is to prevent malicious use of this whois information contact, exposing the customer's privacy information. Get site Domain information using pythonThe following example will use the webmaster's home whois, combined with the use of web crawlers, to obtain whois information. #!/usr/bin/python#-*-coding:utf-8-*-"This code was to get the WHOIS inf

Python stack operation example for implementing the basic data structure, python Data Structure This example describes how to implement the stack operation in the basic data structure of Python. We will share this with you for your reference. The details are as follows: #! /

Example of how to implement a daemon in Python: python daemon Scenario settings: You have compiled a python service program and started it under the command line. Your command line session is controlled by the terminal. The python service becomes a sub-process of the termina

Example of thread pool multi-thread crawler implemented by php and python, python Crawler This example describes the thread pool multi-thread crawling function implemented by php and python. We will share this with you for your reference. The details are as follows: Multi-th

Python list derivation and generator expression usage example, python Generator This article describes the Python list derivation and generator expression usage. We will share this with you for your reference. The details are as follows: Like the list,List DerivationIt is also represented by square brackets [] and uses

Example Analysis of reference and replication usage in python and Analysis of python instances This example describes how to reference and copy data in python. Share it with you for your reference. The specific analysis is as follows: In

Python data analysis: a method example for obtaining the history information of a two-color ball, python Data Analysis This article describes how to obtain the history of a two-color ball through Python data analysis. We will share this with you for your reference. The details are as follows: Everyone has a mid-color t

Example of special wave effects for implementing the PS filter function in Python, python Filter This article describes how to implement the PS filter function in Python. We will share this with you for your reference. The details are as follows: Here, you can use Python to

Example of how to adjust the color gradient of PS Images Using Python, python gradient This article describes how to adjust the color gradient of PS Images Using Python. We will share this with you for your reference. The details are as follows: Here, we use Python to implem

Example of effect of slice conversion for implementing PS filter effects in Python, python Filter This article describes how to implement slice-shaped Effect of PS filter effects in Python. We will share this with you for your reference. The details are as follows: Here, we use Pyt