python cookbook third edition

1, the recursive call in the class to add self;2, Root is None, return 03, Root is not about none,root child for none, return 14. Return the L and r minimum depths, and L and R are initially maximum values;1 #Definition for a binary tree node2 #class TreeNode:3 #def __init__ (self, x):4 #self.val = x5 #self.left = None6 #self.right = None7 8 classSolution:9 #@param root, a tree nodeTen #@return An integer One defmindepth (self, root): A ifRoot = =None: - return0 -

　　　　　　　　　　　　　　 numeric operation built-in function functions nbsp; function ABS (num) Returns the absolute value of num Coerce (NUM1, num2) The Converts NUM1 and num2 to the same type and then returns as a tuple. Divmod (NUM1, num2) Division-the combination of the take redundancy operation. Returns a tuple (Num1/num2,num1%num2). The quotient of floating-point

() if user== Username and Passwd==password:print ("\033[32;1muser has passed authentication\033[0m") Res=func (*args,**kwargs) # print ("---after authentication---") #保留要装饰函数home的输出结果 r Eturn Res else:exit ("\033[31;1minvalid username or password\033[0m") elif au th_type== "LDAP": Print ("Engage the yarn LDAP, will not ....") ") return wrapper return Outer_authdef index (): Print (" Welcome to Index page ") @auth (auth_type=" local ") def Hom E (): Print ("Welcome to Home Pag

Basic Python Tutorial (second edition) Learning note files and materials (11th)Open File:Open (Filename[,mode[,buffering]])Mode is the pattern of reading and writing filesF=open (R ' c:\somefile.txt ') #默认是读模式+ means can read and write, R read mode, W write mode, a append mode, b binary mode;The newline character is \ r \ n in Windows, and in Unix, Python is auto

Basic Python Tutorial (second edition) Learning Note function (Chapter 6th)To create a function:def function_name (params):BlockReturn valuesRecord function:def function_name (params):' NOTE ' #注释BlockReturn valuesfunction_name.__doc__Help (Function_name)Return # no value returnedPosition parameters and keyword parameters:Keyword parameter to provide the name of the parameter:def function_name (Name1=value1

1 #coding:utf-8 # using Windows system, first line ' #!/usr/bin/env Pyton ' useless, all changed to ' # Coding:utf-8 '2 3 'readtextfile.py--Read and display text file'4 5 #get filename6fname = Raw_input ('Enter FileName:')7 Print8 9 #attempt to open file for readingTen Try: OneFobj = open (fname,'R') # Try to open fname A exceptIOError, E:#The detailed cause of the captured IOError error is placed in Object E, and then the except code block that runs the exception (can also be written

Study the Sina Mail registration process, write a registration machine, share for learning, do not use for commercial purposes.Code Escrow Address: Https://bitbucket.org/doggod999/ooobjRun:Operating Environment:Python3requests-2.2.1beautifulsoup-4.1.3#########################################Verification code or have to be hand-lost, image recognition has not been studied, coding machine has not been studied, interested in free to play.Registration is divided into three steps: Sina has thre

This article is divided into two parts, the first part explains how Jenkins replaces Windows scheduled tasks, timed execution of automated scripts, and the second explains that Jenkins automatically pulls the latest code from the SVN server (called Automatic checkout) each time it is built.Objective1. There are test files in the local code base directory F:\5i5jautest all_tests.py2. SVN address Svn://192.168.14.129/sadoc/5i5jautestThe first part is timed to execute the script:The first part of t

1. Recursive call functions in class need to add self#Definition for a binary tree node#class TreeNode:#def __init__ (self, x):#self.val = x#self.left = None#self.right = NoneclassSolution:#@param root, a tree node #@param sum, an integer #@return A Boolean defhaspathsum (self, Root, sum): Ret=FalseifRoot = =None:returnret sum-=Root.valifSum==0 andRoot.left==none androot.right==None:ret=TruereturnRetorSelf.haspathsum (Root.left,sum)orSelf.haspathsum (Root.right,sum)Leetcode:path Sum "

1. Traverse one by one with double loops (timeout)2. Append and remove functions with List B (timeout)3, with Dict B (AC)1 classSolution:2 #@param A, a list of integers3 #@return An integer4 defSinglenumber (Self, A):5B = {}6 forIinchA:7 ifI not inchB:8B[i] = 19 Else:TenB[i] = 2 One forIinchB: A ifB[i] = = 1: -RET =I - Break the returnRetLeetcode:single number "Python