Python

In DOS CD to prepare to do the server root directory under the path, enter the command: PYTHON-M Web server module [port number, default 8000] For example: Python-m simplehttpserver 8080 Then you can enter it in the browser

One, multi-processLinux Platform Examples:unix/linux operating system provides a fork () system call, which is very special. A normal function call, called once, is returned once, but fork () is called once, returning two times, because the

This article is all from my (wheat) "Big Data Public" course handout, including three Python and numpy data analysis package related tutorials, Excel and SPSS data Analysis tutorial, etc., the author is wheat and Yi Wen classmate, is the original

Python Coding Summary:1). First Python has two forms of string, str and Unicode, where Unicode is equivalent to bytecode, which can be used across platforms.Str converted to Unicode can be u,str.decode in three ways by Unicode ()Unicode is converted

def levltwo (levlonelist,levlonenum): "" " entry levlonelist first-level city list entry Levlonenum user selected city serial number The Levltwolist returns a level two city list "" " if Int (levlonenum) Function "" ".... "" "does not

1 Viewing the path of a lookup module in PythonImport syssys.path[', '/usr/bin ', '/usr/lib64/python26.zip ', '/usr/lib64/python2.6 ', '/usr/lib64/python2.6/ Plat-linux2 ', '/usr/lib64/python2.6/lib-tk ', '/usr/lib64/python2.6/lib-old ', '/usr/lib64/

Psutil Cross-platform PS viewing toolExecute pip install Psutil, or compile and install the line.# Output memory usage (in bytes)Import Psutilmem = Psutil.virtual_memory () print Mem.total,mem.used,memprint psutil.swap_memory () # Output get swap

# coding=utf-8 ' Created on June 15, 2014 @author:yang ' import socketimport datetime# Initialize sockets = Socket.socket () # Get host name, can also use localhost# host = Socket.gethostname () host = "localhost" # Default HTTP protocol port number

Python basics How to get a program to receive parameters, the simplest to use sys.argv[] to get1. UsageImport SYS #导入sys模块Sys.argv[tag] #根据参数的下标来取值Where tag is the subscript value, where the program itself is 0,sys.argv[0]2. For example(test_3.4.2) [

1. to add a new element ( object ) at the end of the listL.append (object)--Append object to end>>>l = [' Sam ', ' Shaw ', ' Stiven ']>>>l[' Sam ', ' Shaw ', ' Stiven ']>>>l.append (' Alice ')>>>l[' Sam ', ' Shaw ', ' Stiven ', ' Alice ']2. used to

Collection : Used to contain a set of unordered objects ;It can be understood that putting a list in {} makes up a collectionCreate a collection : Use the Set function or use {} and provide the item to be stored, such as:s = set ([3,5,9,10])

Linked list operations can only be traversed once and then.With a double pointer# Definition for singly-linked list.# class ListNode (object): # def __init__ (self, x): # self.val = x# Self.next = Noneclass Solution (object):

1. The first is a very boring function that implements the two number of addition operations:def f (x, y ): print x+YF (2,3)Output also OK52. But at this point we feel that the output is too singular, to make the output of the code look less

Parameters of the function When defining a function, we determine the name and position of the parameter, and the interface definition of the function is completed.Python's functions, in addition to the normal definition of required parameters,

One. Time moduleTime module provides functions for various operating timesThere are generally two ways to represent time:The first is the way the timestamp is (relative to the offset from 1970.1.1 00:00:00 in seconds), the timestamp is

Why is multi-process rather than multi-thread recommended in python? -- Transfer an article from a colleague I have been reading multiple threads in Python recently. We often hear veterans say, "multithreading in python is a weakness. We recommend

Mysql Data Type 1. Integer MySQL Data Type Meaning (Signed) Tinyint (m) 1 byte range (-128 ~ 127) Smallint (m) 2 bytes range (-32768 ~ 32767) Mediumint (m) 3 bytes range (-8388608 ~ 8388607)

Python-object-oriented (1)-Basics of opening, python-IntroductionObject-Oriented Programming (Object Oriented Programming, OOP, Object-Oriented Programming)  I. Create classes and objects Object-Oriented programming is a programming method, which

Python GUI learning-Tkinter, pythonguitkinter Common python GUI toolkit:Tkinter uses the Tk platform to easily obtain the semi-standard.Wxpython is based on wxWindows. Cross-platformPython Win can only use the Windows GUI function on Windows.Java

Collaborative Filtering and Data Mining collaboration for Data Mining # Coding: UTF-8 _ author _ = 'similarface' # datalink = http://www2.informatik.uni-freiburg.de /~ Cziegler/BX/BX-CSV-Dump.zip ''' BX-Users ["User-ID"; "Location"; "Age"] BX-Books [