Python

# coding:utf-8import requestsfrom bs4 import beautifulsoupimport jsonimport timeimport datetimeimport pymysqlimport Sysreload (SYS) sys.setdefaultencoding (' Utf-8 ') # Gets the article content method def getartinfo (URL): page = Requests.get (URL).

From PIL import Imageim = Image.open ("Picture path")Im.function ()Common functions:1, Im.crop (x,y,x1,y1)Cut the picture, (the horizontal axis of the starting point, the ordinate of the starting point, width, height)2, Im.resize (128,128)Change the

First, decorator foreplay-closuresIn a nutshell, the closure of a function in Python is a reference to an external scope (but not a global scope) in an intrinsic function, so it is not well understood that the following example helps to

Python formatted outputname = "laowang" age = 18 print(age) print(type(name)) print(name + str(age)) print("老王今年%d岁"%age) print("%s今年%d岁"%(name,name)) Print floating-point numbers (Specify the number of decimal places reserved) *

1. Only those parameters at the end of the formal parameter list can have default argument valuesFor example, Def func (A, b=1) is valid, but def func (A=1, b) is not valid.2. The value of the default parameter is an immutable object, such as none,

>>>classTest ():def __init__(self):Pass def __repr__(self):return '1SDF'>>> T =Test ()>>> T#print out the reconstructed value without print directly, oriented to the program, passing in the program1SDF>>>classTest (Exception):def

目标：由python orm model.objects.all().values("id")获取到queryset 格式 [(1,),(2,),(3,)] 转换为格式 (1,2,3) ，以便在jinja2模版中调用#!/usr/bin/env python3# -*- coding:utf-8 -*-# info: list1=[5,5,6]list2=[1,2,3]zipresult=zip(list1,list2)print("1. zipresult:

1.classFab (object):def __init__(self, max): Self.max=Max SELF.N, SELF.A, self.b= 0, 0, 1def __iter__(self):return SelfdefNext (self):ifSELF.N Self.max:r=self.b self.a, self.b= self.b, SELF.A +self.b SELF.N= SELF.N + 1returnRRaiseStopiteration ()def

Python Naming conventionsGoogle Python Naming ConventionsModule_name, modulePackage_name, BagClassName, classMethod_name, methodExceptionname, abnormalFunction_name, functionGlobal_var_name, global variablesInstance_var_name,

Python read many times, not how coding, here simply write a1 #!/usr/bin/python2 defprintside (qsort):3 defInner_print (ls,begin,end):4 Print("(%d,%d)"%(begin,end))5 qsort (ls,begin,end)6 returnInner_print7 8 @printSide9 defqsort

#有一个文件, the file name is Output_1981.10.21.txt. # use Python below: Read the datetime information in the file name and find out what day is the week. # renamed the file to output_yyyy-mm-dd-w.txt# (YYYY: Four-bit year, MM: two-bit month, DD: Two-bit

1shopping_cart=[]2 3commodity=[("iphone", 5000),4("Bike", 200),5(" Book", 100),6("Computer", 3000),7("Car", 10000),8 ]9Salary=input ("Please input your salary:")Ten One #Print (commodity) A ifsalary.isdigit (): -salary=Int (Salary) - whileTrue:

The road to wudao-the five-day post of the refining stage Serialization: changes an object from memory to a stored and transmitted process, and vice versa. The standard format of objects transmitted between different programming languages is json

Use of the django master page, django The master page is used to process the same part of the html page to avoid repeated 1. Add a master page Add the templates folder in the same directory as the manage. py file to save the html file on the master

Python3 Study Notes 3 --- reference http://python3-cookbook.readthedocs.io/zh_CN/latest,Data structures and algorithms (3) 1.11 name slice Assume that you have a piece of code that extracts specific data fields (such as files or similar formats)

A deep understanding of Python's use and principles of supper, pythonsupper I. Preface Python has the concept of inheritance in object-oriented language. It feels awesome at the beginning, and there is also a super class in it. It is often seen that

The road to wudao-the middle of the six-day refining stage, and the road to six-day Refining Some built-in functions: Convert the decimal bin () to binary, oct () to octal, hex () to hexadecimal, Divmod (a, B) returns the tuples of the quotient and

Python3 notes-list, python3 Notes List List deduplication methods: 1 # create a list and put data 2 a = [, 2] 3 B = [,] 4 5 d = [] 6 for I in: 7 if I not in d: 8 d. append (I) 9 print (d) 10 11 # set deduplication 12 B = set (B) 13 print (B) List

Python learning history (1) ------ install python, ------ python According to the course of "Liao Xuefeng", we plan to take 1-2 hours every day for charge. Python is the famous "Uncle turtle" Guido van rosum during the Christmas of 1989, a

Python exception handling, Exception Handling Format: Try:Execute Statement 1Raise custom exception type () T custom exception type: Execute Statement 2 Handle T (exception Type 1, exception type 2 ,......) :# Separate multiple exception types with