Python

Python has two important time modules, theSeveral methods of time module representationTime Tupletime.struct_time ( tm_year=2016, tm_mon=7, tm_mday=21, tm_hour=22, tm_min=32, tm_sec=51 , tm_wday=3, tm_yday=203, tm_isdst=0

Shutil ModuleAdvanced files, folders, Compression pack processing modulesShutil.copyfileobj (FSRC, fdst[, length])Copy the contents of a file to another fileimport shutilshutil.copyfileobj(open(‘old.xml‘,‘r‘), open(‘new.xml‘, ‘w‘))Shutil.copyfile

1 defines a function func (filepath) FilePath: Opens the file with the with implementation for the file name, and outputs the file contents. 1 # -*-coding:utf-8-*- 2 3 4 def func (filepath): 5 6 return Aj.read () 7 8 Print func

DateTime moduleThe interface of the DateTime module is more intuitive and easier to invoke than the time moduleThe DateTime module defines the following classes: Datetime.date: A class that represents a date. The commonly used attributes

Import Flask,jsonFrom tools123 import op_mysql #op_mysql ()#import Tools # Tools123.op_mysql This way you can also call functions# interface, backend servicesServer = flask. Flask (__name__) #把咱们这个app这个python文件当做一个server@server. Route ('/get_user ',

1. View the OpenSSL installation package and discover the missing Openssl-devel package[[Email protected] ~] # rpm-aq|grep OpenSSLopenssl-0.9.8e-20. El5openssl-0.9.8e-20~]#2. Yum Installation Openssl-devel[[Email protected] ~] # Yum Install

In the blink of an hour, decided to start learning Python has been 10 days, although the time is very short, but it is not easy, there have been learning the language of the impulse, but always halfway, actually not no time, not perseverance enough,

Inside a function, you can call other functions. If a function calls itself internally, the function is a recursive function. For example, let's calculate factorial n! = 1 * 2 * 3 * ... * n, denoted by the function fact (n) , you can see: Fact (n) =

Python defines a data type that does not need to be declared and is a dynamically interpreted strongly typed language1. Mainstream interpreter:Official version of the Interpreter: Cpython (running very slowly)The most commonly used interpreter for

One: Dictionary (DIC)A dictionary is the only type of mapping in Python that stores data in the form of key-value pairs (key-value). Python computes the hash function of key and determines the storage address of value based on the computed result,

We saw in the front that the tuple cannot be modified once it is created. Now, let's look at a "mutable" tuple: >>> t = (' A ', ' B ', [' A ', ' B ']) Notice that T has 3 elements:' A ', ' B ' and a list:[' A ', ' B ']. List as a whole is the 3rd

python text character and character value conversions scene: convert characters to ascii or unicode encoding During the conversion process, note the use of the ord and CHR method   >>>Print (ORD (' A '))  the  >>>print (Chr (

#-*-coding:utf-8-*-ImportABCclassStrategy (metaclass=ABC. Abcmeta): @abc. AbstractmethoddefAlgorithm_interface (self):PassclassConcretestrategya (strategy):defAlgorithm_interface (self):Print('algorithm a Implementation')classConcretestrategyb

#-*-coding:utf-8-*-ImportABCclassCommand (metaclass=ABC. Abcmeta):def __init__(self, receiver): Self._receiver=receiver @abc. AbstractmethoddefExecute (self):PassclassConcretecommand (Command):defExecute (self): self._receiver.action

#字典是key-value data type, the dictionary is unordered, there is no subscript (the list has subscript), key must be uniqueinfo = {     "stu001": "Fengxiaoli",     "stu002": "CX",      "stu003": "Wyc",     "stu004": "Ljh",}###-----------------Cycle

test =  "My name is fengxiaoli" # # #确定字符串中字符位置print (Test.rfind ("M"))                     #找到m所在的位置, The rightmost print (Test.find ("name"))                   #找到字符串中name的开头位置, this is 3print (Test[0:test.find ("name"))           #字符串切片, from 0

Exercise 1: Title: Give a positive integer not more than 5 digits, requirements: First, it is a number of digits, second, in reverse order to print out the figures.#encoding =utf-8While True:TryNum=int (raw_input ("input a number not more than 5

Sublime Text 3 and sublimetext Select classCtrl + D select the text occupied by the cursor. Continue to select the next identical text.Alt + F3 select text press the shortcut key to select all the same text at one time for simultaneous editing. For

Python3 and Python3Sequence 1: these are collectively referred to as Sequences Based on the commonalities of lists, tuples, and strings (they are all brothers). 1) Each element can be indexed. 2) the default index values start from scratch (Python

Python crawler weather forecast example (getting started with Tom), python Crawler This article focuses on the Python crawler weather forecast. This is the site to climb this: http://www.weather.com.cn/forecast/ The requirement is to crawl the