反向字母表

Question

我正在尝试修改一段文字以应用以下翻译：

import UIKit
import MapKit
import CoreLocation
import DJISDK
import Foundation

class FlyToPointsViewController: DJIBaseViewController, DJIFlightControllerDelegate, DJIMissionManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!

    var mission: DJIWaypointMission? = nil
    var flightController: DJIFlightController?=nil
    var missionCoordinates=[CLLocationCoordinate2D]()
    var allSteps = [DJIWaypoint]()
    var missionManager: DJIMissionManager?=nil
    var currentState: DJIFlightControllerCurrentState?=nil

    override func viewDidAppear(animated: Bool) {
        let alertController = UIAlertController(title: "Hello Team", message:
            "There are quite a few easter eggs hidden away in here. Hopefully you find them and have a good laugh. Sorry I couldn't make it to test, the mountains are calling. But I put alot of time into this so hopefully it works as expected. I didn't add a return to home functionality to make this a bit spicy for ya so make sure your last point is near you other wise you're gonna do a bit of walking... Cheers ", preferredStyle: UIAlertControllerStyle.Alert)
        alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.Default,handler: nil))
        self.presentViewController(alertController, animated: true, completion: nil)

    }

    override func viewDidLoad() {
        super.viewDidLoad()


        //initialize our aircraft
        mapView.delegate=self

        let aircraft: DJIAircraft? = self.fetchAircraft()
        if aircraft != nil {
            //makes the view controller watch for particular functions like the flight controller one below
            aircraft!.delegate = self
            aircraft!.flightController?.delegate = self
        }
        else{
            print("aircraft not found")
        }

        self.missionManager=DJIMissionManager.sharedInstance()
        self.missionManager?.delegate=self

        //initialize core location to put mapp on our location
        let manager = CLLocationManager()
        if CLLocationManager.authorizationStatus() == .NotDetermined {
            manager.requestAlwaysAuthorization()
        }


        //start uploading location into manager object so we can use .location method
        if CLLocationManager.locationServicesEnabled() {
            manager.startUpdatingLocation()
        }

        //let location = manager.location!.coordinate; //get ipads current location and turn it into a coordinated

        let location = CLLocationCoordinate2DMake(40.0150, -105.2705)

        let region = MKCoordinateRegionMakeWithDistance(location, 7000, 7000) //create a square region using center point and size of square
        mapView.region = region //tells the mapview to center itself around this region

        // Do any additional setup after loading the view.


    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func viewWillDisappear(animated: Bool) {

        let aircraft: DJIAircraft? = self.fetchAircraft()
        if aircraft != nil {
            if aircraft!.flightController?.delegate === self {
                aircraft!.flightController!.delegate = nil
            }
        }

    }



    @IBAction func revealRegionDetailsWithLongPressOnMap(sender: UILongPressGestureRecognizer) {
        if sender.state != UIGestureRecognizerState.Began { return }
        let touchLocation = sender.locationInView(mapView)
        let locationCoordinate = mapView.convertPoint(touchLocation, toCoordinateFromView: mapView)
        self.missionCoordinates.append(locationCoordinate)

        print("Tapped at lat: \(locationCoordinate.latitude) long: \(locationCoordinate.longitude)")
        let annotation = CustomMissionPressLocation(location: locationCoordinate)
        mapView.addAnnotation(annotation)
    }

    //Mark: - Functions Called from Button Presses
    @IBAction func clearCoordinates(sender: AnyObject) {

        self.missionCoordinates=[]
        mapView.removeAnnotations(mapView.annotations)

    }


    @IBAction func startMission(sender: AnyObject) {
        if (!self.missionCoordinates.isEmpty){
            print("start Mission Attempted")
            self.mission = DJIWaypointMission()
            self.mission!.autoFlightSpeed=10
            self.mission!.maxFlightSpeed=15
            self.mission!.exitMissionOnRCSignalLost=true
            let waypoint = DJIWaypoint(coordinate: (self.currentState?.aircraftLocation)!)

            waypoint.altitude=15
            waypoint.speed=10
            waypoint.heading=0
            waypoint.actionRepeatTimes = 1
            waypoint.actionTimeoutInSeconds = 60
            waypoint.cornerRadiusInMeters = 5
            waypoint.turnMode = DJIWaypointTurnMode.Clockwise
            self.mission!.addWaypoint(waypoint)

            for locations in self.missionCoordinates{
                let waypoint = DJIWaypoint(coordinate: locations)
                waypoint.altitude=15
                waypoint.speed=10
                waypoint.heading=0
                waypoint.actionRepeatTimes = 1
                waypoint.actionTimeoutInSeconds = 60
                waypoint.cornerRadiusInMeters = 5
                waypoint.turnMode = DJIWaypointTurnMode.Clockwise

                self.mission!.addWaypoint(waypoint)
            }
            let waypointStep = DJIWaypointStep(waypointMission: self.mission!)


        self.startWayPointMission()
        }

        else{
            let alertController = UIAlertController(title: "Mission Error", message:
                "you haven't added any waypoints ya dingus", preferredStyle: UIAlertControllerStyle.Alert)
            alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.Default,handler: nil))
            self.presentViewController(alertController, animated: true, completion: nil)

        }
    }

    //avoids a bunch of knuckleheads from sending the drone to china
    func missionIsntTooFar()-> Bool{
        let startLoc=self.currentState?.aircraftLocation
        let locations = self.missionCoordinates
        //let startLoc=locations[0]

        for locs in locations{
            let distance = MKMetersBetweenMapPoints(MKMapPointForCoordinate(startLoc!), MKMapPointForCoordinate(locs))
            if distance > 4000{
                return false
            }
        }
        return true
    }
    func startWayPointMission() {
        if self.missionIsntTooFar(){
            self.missionManager?.prepareMission(self.mission!, withProgress: nil, withCompletion: {[weak self]
                (error: NSError?) -> Void in
                if error == nil {

                    print("uploaded")

                    print(String(self?.missionManager?.isMissionReadyToExecute))
                    self?.missionManager?.startMissionExecutionWithCompletion({[weak self]
                        (error: NSError?)->Void in

                        if error == nil{
                            print("mission started")
                        }
                        else{
                            print("error: \(error!)")
                        }
                        })
                }
                else {
                    self?.showAlertResult("mission upload failed \(error!)")
                }
                })
        }

        else{
            mapView.removeAnnotations(mapView.annotations)

            let alertController = UIAlertController(title: "Mission is too far", message:
                "you're trying to fly the drone too far ya knucklehead", preferredStyle: UIAlertControllerStyle.Alert)

            alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.Default,handler: nil))
            self.presentViewController(alertController, animated: true, completion: nil)
        }

    }

    //Mark: - Flight Controller Delegate Methods

    func flightController(fc: DJIFlightController, didUpdateSystemState state: DJIFlightControllerCurrentState) {
        self.flightController=fc
        self.currentState=state
    }

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}
extension FlyToPointsViewController: MKMapViewDelegate{
    func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
        let annotationView = DroneAnnotationView(annotation: annotation, reuseIdentifier: "Attraction")
        annotationView.canShowCallout = false //we're going to customize the callout
        return annotationView
    }

}

也就是说，每个before: abcdefghijqlmnopqrstuvwxyz after: zyxwvutsrqponmlkjihgfedcba 变为a;每个z变为b;每个y变为c;等等。

我的剧本：

x

不幸的是它不起作用。例如，如果我写：

  

我是菜鸟

回报应该是：

  

rznmlly

因为myInput = input("Entrer une chaine de caracteres:\n\n") myInputSansEspace = myInput.replace(" ", "") myInputAsciiInverse = myInputSansEspace.replace("a","z").replace("b","y").replace("c","x").replace("d","w").replace("e","v").replace("f","u").replace("g","t").replace("h","s").replace("i","r").replace("j","q").replace("k","p").replace("l","o").replace("m","n").replace("n","m").replace("o","l").replace("p","k").replace("q","j").replace("r","i").replace("s","h").replace("t","g").replace("u","f").replace("v","e").replace("w","d").replace("x","c").replace("y","b").replace("z","a") print(myInputAsciiInverse) 被i取代; r a; z m;等

我得到的结果是：

  

boonmai

Answer 1

你的方法有副作用，所以不能做你想做的事 第一次更换：

'a...z'.replace('a', 'z') == 'z...z'

现在考虑最后一次替换：

'z...z'.replace('z', 'a') == 'a...a'

因此仅以字母表的一半结束。

您只需将所有replace替换为reverse或切片：

即可

'abc..xyz'.reverse() == 'zyx..cba'
'abc..xyz'[::-1] == 'zyx..cba'

如果您尝试翻译作为密码的方式，那么您可以使用str.maketrans和str.translate，例如：

>>> alphabet = 'abcdefghijklmnopqrstuvxyz'
>>> trans = str.maketrans(alphabet, alphabet[::-1], ' ')
>>> noob = 'I am noob'
>>> noob.lower().translate(trans)
'rznmlly'

注意：alphabet相当于string.ascii_lowercase

以上几乎相当于：

>>> import string
>>> trans_table = dict(zip(string.ascii_lowercase, string.ascii_lowercase[::-1]))
>>> ''.join(trans_table.get(c, c) for c in noob.lower() if c not in ' ')
'rznmlly'

Answer 2

以下是完成替换的功能方法：

s = "I am noob"

import string   
letters = string.ascii_lowercase

# construct a dictionary mapping from a letter to its dual opposite starting from the end
# of the alphabet table
rep_dict = dict(zip(letters, letters[::-1]))

# use the dictionary to replace the letters
''.join(map(rep_dict.get, s.replace(" ", "").lower()))
# 'rznmlly'

您的代码存在的问题是您正在执行replace('a', 'z')....replace('z', 'a')，因此所有以前替换的字符都会被替换回来。

Answer 3

您可以使用python的切片来反转字符串：

>>> my_string = "abcdefghijqlmnopqrstuvwxyz"
>>> my_reversed_string = my_string[::-1]
>>> my_reversed_string
'zyxwvutsrqponmlqjihgfedcba'

编辑：好的所以问题是如何使用反转字母表翻译字符串。有了这样的问题，我想到的第一个就是建立一个字典来进行翻译：

>>> alphabet = "abcdefghijklmnopqrstuvwxyz"
>>> reversed_alphabet = alphabet[::-1] # zyxwvutsrqponmlkjihgfedcba
>>> my_dict = dict(zip(alphabet, reversed_alphabet))
>>> my_str = "i am noob"
>>> translated_str = ''.join(my_dict[c] for c in my_str.replace(' ', ''))
>>> translated_sentence
'rznmlly'

Answer 4

Python有一个名为.reverse()的字符串函数，可以通过

调用

var = "abcdefghijklmnopqrstuvwxyz"
var = var.reverse()
print var


> zyxwvutsrqponmlkjihgfedbca

Answer 5

# -*- coding: utf-8 -*-
"""
Created on Thu Mar 22 11:46:50 2020

@author: Tumbu John
An encryption program "REVERSE ALPHABET"
"""  

包含值的字典（每个字母将转换为新格式）

code = {"a":"z", "b":"y", "c":"x" ,"d":"w" ,"e":"v", "f":"u", "g":"t", "h":"s", "i":"r","j":"q","k":"p","l":"o", "m":"n", "n":"m", "o":"l", "p":"k", "q":"j", "r":"i", "s":"h", "t":"g", "u":"f", "v":"e", "w":"d","x":"c", "y":"b", "z":"a"," ":" "}

plainText = input("Enter text to be encrypted: ")
plainText = plainText.lower() #Converts the input to lowecase letters for better management and error free program since python is case sensitive
encryptedText = ""

For循环检查输入的每个字符，将其转换为各自的值（加密文本）

 for c in plainText:

添加此块是为了使非字母保留在消息中，以防止输入错误不在字典中

if c in "abcdefghijklmnopqrstuvwxyz ":#checks if each character of plainText exist in 26 letters of alphabet
    encryptedText += code[c]
else: #if a character doesn't exist in the dictionary, do nothing to it
    encryptedText+=c

打印加密的文本

print("This is the encrypted text: ",encryptedText)

输出

>>> enter text to be encrypted: abcdefghijklmnopqrstuvwxyz
>>> this is the encrypted text: zyxwvutsrqponmlkjihgfedbca

查看该程序的图片：

Tumbu Nkeng John | Tumbu John |反向字母|反向字母加密程序| python中的加密程序| Python

Answer 6

# p[10:36] -> alphabet(lowercase)
# p[35:9:-1] -> reverse alphabet
# p[:10]+p[36:62]+p[62:] -> Remove uppercase, numbers and special characters 

import string
p = string.printable
k = [(x,y) for x in p[10:36] for y in p[35:9:-1]][0::27]
def solution(x):
    r = []
    for i in x:
        for k1,k2 in k:
            if i in p[:10]+p[36:62]+p[62:]:
                pass
            elif i == k1:
                r.append(k2)
    print(''.join(r))
    
    solution("yeah! i can't believe lance lost his job at the colony!!")

输出：

"bvzs! r xzm'g yvorvev ozmxv olhg srh qly zg gsv xlolmb!!"

Answer 7

以下代码通过忽略大写和其他字符来反转小写字符：

def solution(x): 
    i=0
    m=""
    while(i<len(x)):
        if(ord(x[i])<97 or ord(x[i])>122):
            m=m+(m.join(x[i]))  
        else:
            if(ord(x[i])<123):
                m=m+(m.join(chr(((ord(x[i])+(2*(109-ord(x[i]))+1))))))
        i=i+1 
    print(m)

如果您使用 solution("@Tsrh rh vmxibkg!vw g-.vcg") 运行此代码，那么您将获得：

@This is encrypt!ed t-.ext