Python

First, the document processing process Open the file, get the file handle and assign a value to a variable Manipulating a file with a handle Close File Second, the File open modeWhen you open a file, you need to specify the

Why do I have a function?Without differentiating the code of all functions together, the question is:Poor code readabilityCode redundancyCode can be extended to poorHow to solve?A function is a tool, the process of preparing a tool beforehand is to

A: PrefaceThis crawl is a variety of information about each channel in all stations under the popular section of Himalaya and each audio data in the channel, and then saves the crawled data to MongoDB for later use. This data volume is about 700,000.

Original: http://blog.csdn.net/boksic/article/details/16870453Import urllib2 import timeit import thread import time i = 0 x = 0mylock = Thread.allocate_lock () def Test (NO,R): global i url = ' http://blog.csdn.net/' for J

\ r The default is to return the output to the first pointer, so that later content overwrites the previous content 1 Import SYS2 Import Time3 defView_bar (num,total):4Rate = float (num)/float (total)5rate_num = Int (Rate * 100)6r = ' \r%d%% '%

The RE module in Python provides regular expression-related operations.Character:. Match any character other than line break\w match letters or numbers or underscores or kanji\s matches any whitespace character\d Matching numbers\b Match the

Import Logging #added by Chowhan at 2017-05-03Import Logging.handlersLog_file = "/home/alice/tensorflow_logger.log"Handler = Logging.handlers.RotatingFileHandler (log_file, MaxBytes = 1024*1024, Backupcount = 5) # instantiation HandlerFMT = '%

from email.mime.text import mimetextfrom email.header import headerfrom  Smtplib import smtp_ssldef send_mail (sender_sina= ", pwd=", receiver= ", mail_title=", Mail_ Content= '):    #  mailbox SMTP Server     host_server =  ' Smtp.sina.com '

Enumerate () is a python built-in function.1 Help (Enumerate)2Help onclassEnumerateinchModule Builtins:3 classenumerate (object)4Enumerate (iterable[, start]), iterator forIndex, value of Iterable5#enumerate (iterate variable [, start subscript])

Today's Overview:First, object-oriented advanced1, Isinstance (OBJ,CLS) and Issubclass (Sub,super)2, __setattr__,__getattr__,__delattr__3, two times processing standard type (packing/authorization)4, __setitem__,__getitem__,__delitem__5,

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement.The Python built-in (built-in) function is created as the Python interpreter runs. In Python programs, you can call these functions at any time, and you

First, recursive call1. A function call itself is recursive call, at most one function recursively call themselves 999 times, more than will be wrong2. Recursion must have a definite end condition3. Each time a deeper level of recursion is reached,

Function Once the code has a regular repetition, write only once for the function to be used multiple times (called) Functions that can be used: Custom functions Built-in functions: Document

JSON is good, a little bit wrong, can toss people to death:1. Variables must be enclosed in double quotes2. If it is a string, it must be wrapped in quotation marks.Error:Expecting:delimiter:line 1 Column 6 (char 5) This is a variable, you forgot to

FTP Server1) Read file name2) Check if the file exists3) Open File4) Check the file size5) Send file size to client6) such as client confirmation7) Start reading and sending data on the side Download

BeautifulSoup converts an HTML document into a property structure, with each node being a Python object. This allows us to operate on each node. Refer to the following codeParse_url ():Try:Req=urllib2. Request ('

Directory Recursive algorithm parsing Bubble Sort Resolution Adorner parsing I. Recursion 1. Definition of recursionRecursion (recursion), which is also recursive, in mathematics and computer science, refers to the method of

Here is a small series to bring you a python to write an automatic SSH login remote server gadget (instance). Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting.

Functools module: Tools for managing functionsPartial object: wrapping the original function, providing a default valueImport functools# original function def myfunc (a, b=2): """docstring for MyFunc ()."""Print ('called MyFunc with:', a,

Python3.4 writes data to mysql5.7 cyclically and outputs the data. python3.4mysql5.7 #! /Usr/bin/env python #-*-coding: UTF-8-*-# _ author _ = "blzhu" python studyDate: 2017 "" import pymysql # import MySQLdb # python2 in the product try: # Get A