introduction to gis programming and fundamentals with python and arcgis

1 #题目: Find the value of S=A+AA+AAA+AAAA+AA...A, where a is a number. For example 2+22+222+2222+22222 (there are 5 numbers added at this time), several numbers are added with keyboard control.Code:2 3 num = int (input (' Enter the number that needs to be added: ')) 4 m = int (input (' Please enter the number of times to add: ')) 5 s = 0 6 for j in Range (1,m+1): 7 for I in Range (1,J+1): 8 s + = num* (10** (i-1)) 9 print (s)Operation Result:[[email protected] code_100]#

1 #题目: If a number is exactly equal to the sum of its factors, this number is called the "end number". For example, 6=1+2+3. Programming to find all the finished numbers within 1000.Code:2 3 for I in Range (1,1001): 4 s = 0 5 for j in Range (1,i): 6 if I%j = = 0:7 S + = J 8 if s = = I:9 print (i)Operation Result:[[email protected] code_100]# python code_19.py 628496[[email protected] code_100]#Code Explanat

Introduction to basic socket programming in Python, pythonsocket In network communication, sockets are almost everywhere. It can be seen as an intermediate software abstraction layer for communications between the application layer and the TCP/IP protocol cluster. It is an interface for two applications to communicate with each other, in addition, the complex TCP

address families, Python supports a variety of address families, but since we only care about network programming, most of the time I use af_inet only)Iv. Socket WorkflowA scene in the life. You have to call a friend, dial first, a friend hears a phone call, and then you and your friend establish a connection, you can talk. When the communication is over, hang up the phone and end the conversation. The sce

about PythonPython is a high-level scripting language that combines explanatory, compiled, interactive, and object-oriented.Python's design is highly readable, with English keywords often used in other languages, some punctuation in other languages, and it has a more distinctive grammatical structure than other languages. Python is an interpreted language: This means that there is no compilation in the development process. Similar to the PHP

Introduction to MapReduce and HDFsWhat is Hadoop? Google proposes a programming model for its business needs MapReduce and Distributed file systems Google File system, and publishes relevant papers (available on Google Research's web site: GFS, MapReduce). Doug Cutting and Mike Cafarella the two papers when they developed the search engine Nutch, the MapReduce and HDFs of the same name, together with Hadoo

server. close () Client code: #! /Usr/bin/env python #-*-coding: UTF-8-*-import socket # create client socket object clientsocket = socket. socket (socket. AF_INET, socket. SOCK_STREAM) # server IP address and port number tuples server_address = ('2017. 0.0.1 ', 8888) # The IP address and port number specified for client connection. connect (server_address) while True: # input data = raw_input ('Please input: ') # client sends data to clientsocket. s

1 #题目: A ball from the height of 100 meters free fall, each landing after the back to the original height of half, and then fall, the 10th time to landing, how many meters? How high is the 10th time rebound?Code:2 3 h = 0 4 li = [] 5 for I in Range (1,11): 6 s = 100/(2** (i-1)) 7 li.append (s) 8 9 for x in Li:10 H + = x print (LI) print (' The ball is on the tenth time, it has been%.10f m, the 10th bounce height is%.10f '% ((h*2-100), LI[-1]/2)Operation Result:[[email protected] code_100]#

1 #题目: Two table tennis team to play, each out of three people. Team A for A,b,c three, team B for X, Y, z three people. Have drawn lots to determine the contest list. Someone asked the team for a list of matches. A says he does not compare with X, C says he does not compare with x,z, please compile the procedure to find out the list of the three teams.Code:2 3 ' a '! = ' x ' 4 ' c '! = ' x ' 5 ' c '! = ' Z ' 6 7 if (' x '! = ' A ') and (' x '! = ' C '): 8 print (' x---B ') 9 if ' C '! = ' Z ':

Introduction to the Chapter3 list3.1 What is a list?A list is a series of elements that are arranged in a particular order.bicycle = [' Trek ', ' Cannondale ']Print Bicycle3.1.1 Accessing list elementsPrint (Bicyle[0])3.1.2 Index starting from 0 instead of 1Python provides a special syntax for accessing a list element. You can have Python return the last list element by specifying the index as 1.Print (Bocy

+ high)/2.0CTR + =1 assertCtr -,' iteration count exceeded ' Print ' Bi method. Num. Iterations: ', CTR,' Estimate: ', GuessreturnGuess def squarerootnr(x, epsilon): "" " Return y s.t. Y*y is within epsilon of X" " assertEpsilon >0,' Epsilon must is postive, not '+ str (epsilon) x = float (x) guess = x/2.0Guess =0.001diff = Guess * *2-X ctr =1 whileABS (diff) > Epsilon andCtr -:# print ' Error: ', diff, ' Guess: ', guess guess = guess-diff/(2.0*guess)diff = Guess * *2-X ctr +

"This is the answer I wrote:# Your code hereIf Len (aStr) = = 0:Return FalseElif len (aStr) = = 1:if aStr = = Char:Return TrueElseReturn FalseElseif char = = Astr[len (aStr)//2]:Return TrueElif Char Return IsIn (char, Astr[:len (ASTR)//2])else:Return IsIn (char, Astr[len (ASTR)//2+1:])def isIn (char, ASTR): "This is the standard answer: char:a single character Astr:an alphabetized string returns:true if char I s in AStr; False otherwise ' # Base case:if aStr is empty, we do not find the char.

= ' Chinese ' 4 def __init__ (self,name,sex,age): 5 Self.nam E=name 6 self.sex=sex 7 self.age=age 8 def sleep (self): 9 print ('%s is eating '%self.name)- def Work: one print ('%s is working '%self.name) P1=chinese (' Bob ', ' Man ', ') ' P2=chinese (' Natasha ', ' Woman ', 28 ) # chinese.work () #抛出TypeError15 p1.work () p2.work () #输出结果18 Bob is working19 Natasha are workingThe result is that the functions defined in the class are only fo

maximize the use of CPU　　Disadvantages are as follows:1, the nature of the process is single-threaded, unable to use multicore, can be a program to open multiple processes, each process to open multiple threads, each process to open multiple threads, each line range open 2, the association refers to a single thread, so once the association is blocked, it will block the entire thread　　Summary of the characteristics of the process:1. Concurrency must be implemented in only one single thread2. No

I. Introduction of Tkinter Tkinter is a Python module, an interface called TCL/TK, which is a cross-platform scripting GUI interface. Tkinter is not the only Python graphics programming interface, but it is one of the more popular ones. The biggest feature is the cross-platform, the disadvantage is the performance is

need to change the source code and recompile, the time wasted, low timeliness, and poor cross-platform.Explanatory: An interpreted language does not require a compiler to compile code, but instead uses an interpreter (or virtual machine) to translate into machine language at run time, once for each execution. Inefficient operation, dependent on the interpreter. The advantage is that because of the use of interpreters, the cross-platform is good, and the explanatory language can dynamically adju

1 #题目: Give a positive integer not more than 5 bits, requirements: First, it is a number of digits, second, in reverse order to print out the figures.Code:2 3 li = List (input (' Enter a positive integer not more than 5 bits: ')) 4 n = Len (LI) 5 print (' This positive integer is%d digits '%n) 6 i = 0 7 8 def order (Li,n,i): 9 If I Operation Result:[[email protected] code_100]# python code_29.py Enter a positive integer with no more than 5 bits: 25689

internallyCharacteristics:There must be a definite end condition, no end condition will result in exceeding the maximum number of recursive layers (English) error, maximum 999 levelsEvery step deeper, the problem should be less than it was last time.Inefficient, function is called by the stack, may cause stack OverflowIn Python, division by default can be the result of a decimal, and if you want to take an integer, truncate (//) with an int (1/2). ）R

" #convert number to a name using If/elif/else #don ' t forget to return the result! defRpsls (player_choice):#Delete the following pass statement and fill in your code below #print a blank line to separate consecutive games Print "" #Print out the message for the player ' s choice Print "Player chooses", Player_choice#convert the player ' s choice to player_number using the function name_to_number ()Player_number =Name_to_number (Player_choice)#compute random gu

=FalseGlobalSecret_number Secret_number= Random.randint (0,999) Globalnumber_of_guess number_of_guess= 10Print "New game. Range is [0,1000]" Print "Number of remaining guesses is", Number_of_guessPrint definput_guess (guess):#main game logic goes here GlobalGuess_number Guess_number=Int (guess)Print "Guess was", Guess_numberGlobalnumber_of_guess number_of_guess-= 1Print "Number of remaining guesses is", Number_of_guessifSecret_number >Guess_number:Print "higher!" Print