Python

#-*-Coding:utf-8-*-# python:2.x__author__ = ' Administrator 'From ftplib import ftp# loading# method or property# ftp=ftp () # variable# Ftp.set_debuglevel (2) # debug Level 2, show details# ftp.connect (' IP ', ' Port ') # connect to FTP server and

The Python list is like an array.Define an empty list:A=[]a=list ()The build list can be used as a list derivation to generate a list:Ls1=[1,2,3,4]ls2=[x*x for x in lst1]# ls2=[1,4,9,16]　Some ways to list:Define a list of LSLs.append (x)Appends an

You can specify the number of Python threads to run in parallel by Threading.semaphore ().#!/usr/bin/python2.7#File:threadsNum.py#Author:lxw#time:2014-09-07#Usage:demonstration for control the number of threads.ImportThreading

ListThere is not necessarily only one type of content in list, a list may have both number and string, and possibly a child listlist is denoted by []The basic methods of list are: Append,sort, etc.To remove an element from a list, you can use the

Sequence: Consists of a string, a tuple, a listThere are two features: You can use the index operator and the slice operatorIndex can be negative, str[-1] means the last element is taken outThe slice operator is a sequence name followed by a square

If#!/usr/bin/python Number=23Guess=int (Input ('Enter an Interger:'))#input Returns the result of a string type, which needs to be converted to the int type with int ()ifGuess = =Number :Print('You guessed in.')elifGuess Number :Print('No, it's a

Fast row, take a key value, generally take the first one, will be less than key to the left, greater than the key to the right, recursive implementation1 ImportRandom2 defQuicksort (data, low = 0, high =None):3 ifHigh = =None:4High = len (data)-1

#decoding =utf-8‘‘‘Write a table of employee information that can be queried by users!1| user authenticationID Name Department PhoneQuery Keywords: name‘‘‘Import linecacheinput01=raw_input ("pls write your name:") I=1name=[]count = Len (open (' User.

The unit test process in PythonLooked at the unit test flow in Python, wrote a test code to see the overall testing processSummarized as follows A test case class should derive from UnitTest. TestCase The normal test case is called in

#-*-Coding:utf-8-*-# python:2.x__author__ = ' Administrator '# function: A notification that waits for input or the output channel is ready"""Allows access to specific platform I/O monitoring functions, the most portable interface is the POSIX

Python provides three built-in data structures:List tuple DictionariesA. List (you can check the list, insert, delete, change)#!/usr/bin/python#filename:using_list.pyshoplist=[' apple ', ' mango ', ' carrot ', ' banana ']print  ' i have ', Len

To prevent the acquisition and release of ordinary locks without much explanation#!/usr/bin/env python#-*-coding:utf-8-*-ImportThreadingImport TimeclassMyThread (Threading. Thread):defRun (self):GlobalNum Time.sleep (1) ifMutex.acquire (1):

Requirements:1, accept user input;2, judge whether the user is Alex, if not re-accept input;3, determine whether the user Alex Password is 11111, if not re-enter;The code is as follows:Input=raw_input ("Your name:") while true:    if input== ' Alex '

① expression: A formula that combines different data (including functions, variables) with operators according to certain rules② operator :Arithmetic operators :+ addition operator-Subtraction operator* Multiplication operator/division operator,

I believe that the following Python code was really not hard to understand. But I think we should use these tipsIn our own code.defMain ():#To judge whether a list is empty. We can use "if list0" instead of "If Len (list0)". But we must are aware

Python Tkinter basic control entry instance, pythontkinter This section describes how to use a basic Python Tkinter control, including window display, built-in image display, pop-up window, and menu display. Example: Python Tkinter basic control

Python tkinter layout: simple implementation of chat window, pythontkinter This example shows a simple chat window with python tkinter layout. Share it with you for your reference. The specific method is as follows: This instance shows a simple chat

Python Tkinter simple layout example tutorial, pythontkinter This example shows how to implement a simple layout using Python Tkinter. The example provides detailed annotations for readers to understand. Share it with you for your reference. The

Getting started with python crawlers: Sharing hundreds of image Crawlers, Learning python and writing crawlers are indispensable. crawlers can not only learn and practice python on a dot-and-dot basis, but also be useful and interesting. A large

3 methods for Traversing files in python, Today, I wrote a python script for modifying file names in batches in windows and used file traversal. There are multiple methods to traverse objects using python. OS. path. walk () This is a traditional