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XChange | Java library providing a streamlined API | Cryptography library

 by   knowm Java Version: Current License: MIT

 by   knowm Java Version: Current License: MIT

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kandi X-RAY | XChange Summary

XChange is a Java library typically used in Financial Services, Fintech, Security, Cryptography, Ethereum, Bitcoin applications. XChange has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.
XChange is a Java based library providing a simple and consistent API for interacting with a diverse set of crypto currency exchanges.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • XChange has a medium active ecosystem.
  • It has 3451 star(s) with 1818 fork(s). There are 251 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 269 open issues and 1366 have been closed. On average issues are closed in 62 days. There are 33 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of XChange is current.
XChange Support
Best in #Cryptography
Average in #Cryptography
XChange Support
Best in #Cryptography
Average in #Cryptography

quality kandi Quality

  • XChange has 0 bugs and 0 code smells.
XChange Quality
Best in #Cryptography
Average in #Cryptography
XChange Quality
Best in #Cryptography
Average in #Cryptography

securitySecurity

  • XChange has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • XChange code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
XChange Security
Best in #Cryptography
Average in #Cryptography
XChange Security
Best in #Cryptography
Average in #Cryptography

license License

  • XChange is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
XChange License
Best in #Cryptography
Average in #Cryptography
XChange License
Best in #Cryptography
Average in #Cryptography

buildReuse

  • XChange releases are not available. You will need to build from source code and install.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions are not available. Examples and code snippets are available.
  • It has 272038 lines of code, 26008 functions and 4956 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
XChange Reuse
Best in #Cryptography
Average in #Cryptography
XChange Reuse
Best in #Cryptography
Average in #Cryptography
Top functions reviewed by kandi - BETA

kandi has reviewed XChange and discovered the below as its top functions. This is intended to give you an instant insight into XChange implemented functionality, and help decide if they suit your requirements.

  • Open a connection to the specified uri .
    • Retrieves the list of trades for an account .
      • Translates a list of bipfly transactions to funding records .
        • Create a restricted SSLSocketFactory that can be used to restrict the given configuration .
          • Fetch all open orders
            • Send limit order response
              • Adapts a JsonOrderBook to a OrderBook object .
                • Generate a SHA - 256 signature .
                  • Handles messages .
                    • Do post exchange .

                      Get all kandi verified functions for this library.

                      Get all kandi verified functions for this library.

                      XChange Key Features

                      [x] MIT license

                      [x] consistent API across all implemented exchanges

                      [x] active development

                      [x] very minimal 3rd party dependencies

                      [x] modular components

                      REST API

                      copy iconCopydownload iconDownload
                      Exchange bitstamp = ExchangeFactory.INSTANCE.createExchange(BitstampExchange.class);
                      MarketDataService marketDataService = bitstamp.getMarketDataService();
                      Ticker ticker = marketDataService.getTicker(CurrencyPair.BTC_USD);
                      System.out.println(ticker.toString());
                      

                      Websocket API

                      copy iconCopydownload iconDownload
                      // Use StreamingExchangeFactory instead of ExchangeFactory
                      StreamingExchange exchange = StreamingExchangeFactory.INSTANCE.createExchange(BitstampStreamingExchange.class);
                      
                      // Connect to the Exchange WebSocket API. Here we use a blocking wait.
                      exchange.connect().blockingAwait();
                      
                      // Subscribe to live trades update.
                      Disposable subscription1 = exchange.getStreamingMarketDataService()
                          .getTrades(CurrencyPair.BTC_USD)
                          .subscribe(
                              trade -> LOG.info("Trade: {}", trade),
                              throwable -> LOG.error("Error in trade subscription", throwable));
                      
                      // Subscribe order book data with the reference to the subscription.
                      Disposable subscription2 = exchange.getStreamingMarketDataService()
                          .getOrderBook(CurrencyPair.BTC_USD)
                          .subscribe(orderBook -> LOG.info("Order book: {}", orderBook));
                      
                      // Wait for a while to see some results arrive
                      Thread.sleep(20000);
                      
                      // Unsubscribe
                      subscription1.dispose();
                      subscription2.dispose();
                      
                      // Disconnect from exchange (blocking again)
                      exchange.disconnect().blockingAwait();
                      

                      Maven

                      copy iconCopydownload iconDownload
                      <dependency>
                        <groupId>org.knowm.xchange</groupId>
                        <artifactId>xchange-core</artifactId>
                        <version>5.0.13</version>
                      </dependency>
                      <dependency>
                        <groupId>org.knowm.xchange</groupId>
                        <artifactId>xchange-XYZ</artifactId>
                        <version>5.0.13</version>
                      </dependency>
                      

                      Problems with moving an enemy towards a character in pygame

                      copy iconCopydownload iconDownload
                      hunter_rect = pygame.Rect(500, 500, 48, 60)
                      hunter_x, hunter_y = hunter_rect.topleft
                      
                      # [...]
                      while True:
                          # [...]
                      
                          hunter_x -= xchange
                          hunter_y -= ychange
                          hunter_rect.topleft = round(hunter_x), round(hunter_y)
                      
                          # [...]
                      

                      Acton in for loop not affecting all sprites in a group

                      copy iconCopydownload iconDownload
                      # enemy.rect.x += enemy.xChange           <-- DELETE
                      
                      timer = timer + 1
                      
                      for enemy in enemyList:
                          enemy.rect.x += enemy.xChange       # <-- INSERT
                          enemy.moveLR()
                      
                      class Enemy(pygame.sprite.Sprite):
                          # [...]
                      
                          def moveLR(self):
                      
                              self.rect.x += self.xChange     # <---
                      
                              if self.rect.x >= 750 and self.xChange > 0:
                      
                                  self.xChange = -5
                                  self.rect.y = self.rect.y +30
                              
                              if self.rect.x <= 0 and self.xChange < 0:
                      
                                  self.xChange = 5
                                  self.rect.y = self.rect.y +30
                      
                      for enemy in enemyList:
                          enemy.moveLR()
                      
                      # enemy.rect.x += enemy.xChange           <-- DELETE
                      
                      timer = timer + 1
                      
                      for enemy in enemyList:
                          enemy.rect.x += enemy.xChange       # <-- INSERT
                          enemy.moveLR()
                      
                      class Enemy(pygame.sprite.Sprite):
                          # [...]
                      
                          def moveLR(self):
                      
                              self.rect.x += self.xChange     # <---
                      
                              if self.rect.x >= 750 and self.xChange > 0:
                      
                                  self.xChange = -5
                                  self.rect.y = self.rect.y +30
                              
                              if self.rect.x <= 0 and self.xChange < 0:
                      
                                  self.xChange = 5
                                  self.rect.y = self.rect.y +30
                      
                      for enemy in enemyList:
                          enemy.moveLR()
                      
                      # enemy.rect.x += enemy.xChange           <-- DELETE
                      
                      timer = timer + 1
                      
                      for enemy in enemyList:
                          enemy.rect.x += enemy.xChange       # <-- INSERT
                          enemy.moveLR()
                      
                      class Enemy(pygame.sprite.Sprite):
                          # [...]
                      
                          def moveLR(self):
                      
                              self.rect.x += self.xChange     # <---
                      
                              if self.rect.x >= 750 and self.xChange > 0:
                      
                                  self.xChange = -5
                                  self.rect.y = self.rect.y +30
                              
                              if self.rect.x <= 0 and self.xChange < 0:
                      
                                  self.xChange = 5
                                  self.rect.y = self.rect.y +30
                      
                      for enemy in enemyList:
                          enemy.moveLR()
                      

                      Property 'value' does not exist for $event.target.value in typescript/angularjs

                      copy iconCopydownload iconDownload
                      <input name="firstName" (input)="firstName=getValue($event)" [value]="firstName" class="firstNameInput" />
                      
                      getValue(event: Event): string {
                        return (event.target as HTMLInputElement).value;
                      }   
                      
                      <form #theForm>
                      
                      <input name="firstName" [(ngModel)]="firstName"  class="firstNameInput" />
                      
                      <input name="firstName" (input)="firstName=getValue($event)" [value]="firstName" class="firstNameInput" />
                      
                      getValue(event: Event): string {
                        return (event.target as HTMLInputElement).value;
                      }   
                      
                      <form #theForm>
                      
                      <input name="firstName" [(ngModel)]="firstName"  class="firstNameInput" />
                      
                      <input name="firstName" (input)="firstName=getValue($event)" [value]="firstName" class="firstNameInput" />
                      
                      getValue(event: Event): string {
                        return (event.target as HTMLInputElement).value;
                      }   
                      
                      <form #theForm>
                      
                      <input name="firstName" [(ngModel)]="firstName"  class="firstNameInput" />
                      
                      <input name="firstName" (input)="firstName=getValue($event)" [value]="firstName" class="firstNameInput" />
                      
                      getValue(event: Event): string {
                        return (event.target as HTMLInputElement).value;
                      }   
                      
                      <form #theForm>
                      
                      <input name="firstName" [(ngModel)]="firstName"  class="firstNameInput" />
                      

                      Javascript for a dynamic PDF stamp dialog box not working

                      copy iconCopydownload iconDownload
                      var pagDlg =
                      {
                      
                          result: "cancel",
                          DoDialog: function () { return app.execDialog(this); },
                          //definitions
                          strDefFmt: "dd-mm-yyyy",
                          strFmt: "dddd d mmmm, yyyy",
                          vDate: new Date,
                          strDate: "",
                          iOChecked: false,
                          abwChecked: false,
                          //
                          SetListSel: function (list, path) {
                              if (path.length == 0) return;
                              eval("list[\"" + ((path.join != "function") ? path : path.join("\"][\"")) + "\"] = 1");
                          },
                          GetListSel: function (oLstResult) {
                              for (var item in oLstResult) {
                                  if ((typeof oLstResult[item] == "number") && (oLstResult[item] > 0))
                                      return item;
                              }
                              return "";
                          },
                          formatDate: function (d, f) {
                              return util.printd(f, d);
                          },
                          //Initialize values that will be used in the pop-up dialogue
                          initialize: function (dialog) {
                              var unit = "Technical Services & Design";
                              this.strDate = this.formatDate(this.vDate, this.strDefFmt);
                              //this.strDate = this.formatDate(this.vDate, "dd mmmm, yyyy");
                              //
                              var dlgInit =
                              {
                                  "date": this.strDate,
                                  "free": "Enter your description text here.", //enable this checkbox option as default
                                  "abw_2": IdentityName + ", " + unit,
                                  "rma": "RMA Stage",
                              };
                              dialog.load(dlgInit);
                              iOChecked = dlgInit["free"]; // initialise and keep it the same as the value in dlgInit
                              abwChecked = dlgInit["abw_2"];
                              rmaChecked = dlgInit["rma"];
                          },
                          commit: function (dialog) { // Called when OK button is pressed
                              var oRslt = dialog.store();
                              var path = new Array();
                              var d = oRslt["date"];  //OK Go date
                              //
                              if (typeof d == "string")
                                  d = util.scand(this.strDefFmt, d);
                              if (d != null)
                              {
                                  var cur = new Date;
                                  d = new Date(d.getFullYear(), d.getMonth(), d.getDate(), cur.getHours(), cur.getMinutes(), cur.getSeconds());
                              }
                              this.vDate = d;
                              //
                      
                              this.rmaChecked = oRslt["rma"];
                              this.iOChecked = oRslt["free"];
                              this.abwChecked = oRslt["abw_2"];
                              this.strDate = oRslt["date"];
                          },
                          //Description of the layout of the Dialoge Window
                          description:
                          {
                              name: "Stamp details",
                              width: 450,
                              elements:
                              [
                                  {
                                      type: "view",
                                      width: 450,
                                      elements:
                                      [
                                          {
                                              type: "view",
                                              align_children: "align_row",
                                              elements:
                                              [
                                                  {
                                                      item_id: "lbl1",
                                                      name: "RMA Stage",
                                                      type: "static_text",
                                                      width: 100,
                                                  },
                                                  {
                                                      item_id: "rma",
                                                      type: "edit_text",
                                                      width: 300,
                                                  },
                                              ]
                                          },
                                          {
                                              type: "view",
                                              align_children: "align_row",
                                              elements:
                                              [
                                                  {
                                                      item_id: "lbl1",
                                                      name: "Free text",
                                                      type: "static_text",
                                                      width: 100,
                                                      alignment: "align_top",
                                                      align_children: "align_top",
                                                  },
                                                  {
                                                      item_id: "free",
                                                      type: "edit_text",
                                                      multiline: true,
                                                      width: 300,
                                                      height: 88,
                                                  },
                                              ]
                                          },
                                          {
                                              type: "view",
                                              align_children: "align_row",
                                              elements:
                                              [
                                                  {
                                                      item_id: "lbl1",
                                                      name: "Name and team",
                                                      type: "static_text",
                                                      width: 100,
                                                  },
                                                  {
                                                      item_id: "abw_2",
                                                      type: "edit_text",
                                                      width: 300,
                                                  },
                                              ]
                                          },
                                          {
                                              type: "view",
                                              align_children: "align_row",
                                              elements:
                                              [
                                                  {
                                                      item_id: "lbl1",
                                                      name: "Date",
                                                      type: "static_text",
                                                      width: 100,
                                                  },
                                                  {
                                                      item_id: "date",
                                                      type: "edit_text",
                                                      DateEdit: true,
                                                      width: 100,
                                                  }
                                              ]
                      
                                          },
                                          {
                                              type: "ok_cancel",
                                          },
                                      ]
                                  }
                              ]
                          }
                      };
                      /* NAME */
                      var IdentityName, IdentityNameSplit;
                      
                      /* Find correctly formatted username from Identity info */
                      if((identity.name != null) && !/^\s*$/.test(identity.name))
                          IdentityName = identity.name;
                      else
                          IdentityName = identity.loginName.replace(/\./g," ").replace(/\./g," ").replace(/\b(\w)/g,function(Word,cFst){return cFst.toUpperCase()});
                      
                      if (IdentityName.indexOf(', ') > -1) { // If the result is "Surname, Firstname" swap the names to make "Firstname Surname"
                          IdentityNameSplit = IdentityName.split(', ');
                          IdentityName = IdentityNameSplit[1] + " " + IdentityNameSplit[0];
                      }
                      
                      if (event.source.forReal && (event.source.stampName == "#T2CKw07Lo6sr42d6F3ao#0"))
                      {
                          if (pagDlg.DoDialog() == "ok")
                          {
                              var d = pagDlg.vDate; 
                      
                              this.getField("Text1").value = pagDlg.rmaChecked; // RMA Stage
                              this.getField("Text2").value = pagDlg.iOChecked; // Free text
                              this.getField("Text3").value = pagDlg.abwChecked; // Name and team
                              this.getField("Text4").value = util.printd(pagDlg.strFmt, d); // Date
                          }
                          else
                          {
                              app.alert("Stamp cancelled", 3);
                          }
                      }
                      else
                      {
                          var d = pagDlg.vDate;
                          event.value = util.printd(pagDlg.strFmt, d);
                      }
                      

                      Parsing Json response value Python

                      copy iconCopydownload iconDownload
                      for i in range(len(response['records'])):
                       print(response['records'][i]['Invoice_URL__c'])
                      

                      Sorting by different data members of a class C++

                      copy iconCopydownload iconDownload
                      template <typename Comparator>
                      void my_sort(int a[], record r[],int n, Comparator comp)
                      {
                          /*...*/ 
                          if (comp(r[a[j], r[a[j+1]]) // instead of   if(r[a[j]].name>r[a[j+1]].name)
                          /*...*/ 
                      }
                      
                      my_sort(a,r,n,[](const record& a, const record& b) { return a.name < b.name; });
                      
                      template <typename Comparator>
                      void my_sort(int a[], record r[],int n, Comparator comp)
                      {
                          /*...*/ 
                          if (comp(r[a[j], r[a[j+1]]) // instead of   if(r[a[j]].name>r[a[j+1]].name)
                          /*...*/ 
                      }
                      
                      my_sort(a,r,n,[](const record& a, const record& b) { return a.name < b.name; });
                      

                      Trying to change image of moving character in every 0.25 seconds PyGame

                      copy iconCopydownload iconDownload
                      class Player:
                      
                          def __init__(self):
                      
                              self.animate_time = None
                              self.walk_count = 0
                       
                          def draw(self):
                      
                              current_time = pygame.time.get_ticks()
                              current_img = self.img
                              
                              if self.xchange != 0:
                                  current_img = self.walk1 if self.walk_count % 2 == 0 else self.walk2
                      
                                  if self.animate_time == None:
                                      self.animate_time = current_time + 250 # 250 milliseconds == 0.25 seconds
                                  elif current_time >= self.animate_time
                                      self.animate_time += 250
                                      self.walk_count += 1
                              else: 
                                  self.animate_time = None
                                  self.walk_count = 0
                      
                              screen.blit(current_img, (self.x, self.y)) 
                      

                      pygame Inputs and movement smoothing

                      copy iconCopydownload iconDownload
                      while running:
                          for event in pygame.event.get():
                              if event.type == pygame.QUIT:
                                  running=False
                      
                          keys = pygame.key.get_pressed()
                          xchange = 0.0
                          ychange = 0.0 
                          if keys[pygame.K_LEFT]: 
                              xchange -= 0.1 
                          if keys[pygame.K_RIGHT]: 
                              xchange += 0.1 
                          if keys[pygame.K_UP]: 
                              ychange -= 0.1 
                          if keys[pygame.K_DOWN]: 
                              ychange += 0.1 
                          playerX += xchange
                          playerY += ychange
                          
                          screen.fill((0, 50, 90))
                          player()
                          pygame.display.update()
                          clock.tick(500)
                      
                      while running:
                          for event in pygame.event.get():
                              if event.type == pygame.QUIT:
                                  running=False
                      
                          keys = pygame.key.get_pressed()
                          playerX += (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * 0.1
                          playerY += (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * 0.1 
                          
                          screen.fill((0, 50, 90))
                          player()
                          pygame.display.update()
                          clock.tick(500)
                      
                      while running:
                          for event in pygame.event.get():
                              if event.type == pygame.QUIT:
                                  running=False
                      
                          keys = pygame.key.get_pressed()
                          xchange = 0.0
                          ychange = 0.0 
                          if keys[pygame.K_LEFT]: 
                              xchange -= 0.1 
                          if keys[pygame.K_RIGHT]: 
                              xchange += 0.1 
                          if keys[pygame.K_UP]: 
                              ychange -= 0.1 
                          if keys[pygame.K_DOWN]: 
                              ychange += 0.1 
                          playerX += xchange
                          playerY += ychange
                          
                          screen.fill((0, 50, 90))
                          player()
                          pygame.display.update()
                          clock.tick(500)
                      
                      while running:
                          for event in pygame.event.get():
                              if event.type == pygame.QUIT:
                                  running=False
                      
                          keys = pygame.key.get_pressed()
                          playerX += (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * 0.1
                          playerY += (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * 0.1 
                          
                          screen.fill((0, 50, 90))
                          player()
                          pygame.display.update()
                          clock.tick(500)
                      

                      Digital signature not visible in Adobe reader but visible in Foxit reader

                      copy iconCopydownload iconDownload
                      18 0 obj
                      <<
                      /Type /Annot
                      /Subtype /Widget
                      /FT /Sig
                      /Rect [0 0 0 0]
                      /V 17 0 R
                      /T (         )
                      /F 4
                      /P 1 0 R
                      >>
                      endobj 
                      

                      Data frame won't update using observeEvent in Shiny R

                      copy iconCopydownload iconDownload
                      library(shiny)
                      library(DT)
                      
                      current.shiny <- data.frame(
                          "Task" = as.character(c("Task 1", "Task 2", "Task 3")),
                          "Completed" = as.character(c("Yes", "NO", "Yes")),
                          "Date.Completed" = as.Date(c("2020-10-19", "2020-10-20", "2020-10-21"))
                        )
                      
                      ui <- fluidPage(
                        # Application title
                        titlePanel("Week of 11.02.2020"),
                        
                        # Sidebar with reactive inputs
                        sidebarLayout(
                          sidebarPanel(
                            selectInput(
                              inputId = "task.choice",
                              label = "Task",
                              choices =  c(as.list(current.shiny$Task))
                            ),
                            selectInput(
                              inputId = "completed",
                              label = "Completed?",
                              choices = c("Yes" = "Yes", "No" = "No")
                            ),
                            dateInput(inputId = "date.completed", label = "Date Completed"),
                            actionButton("update", "Update Sheet")
                          ),
                          mainPanel(column(
                            12,
                            DT::dataTableOutput("xchangeOut", width = "100%")
                          ))
                        ))
                      
                      server <- function(input, output) {
                        xchange <- reactiveVal(current.shiny)
                        observeEvent(input$update, {
                          test.data <- xchange()
                          test.data$Completed[test.data$Task == input$task.choice] <-input$completed
                          test.data$Date.Completed[test.data$Task == input$task.choice] <- input$date.completed
                          xchange(test.data)
                          # write.csv
                        })
                        
                        #Display the most recent file, with the most recent changes
                        output$xchangeOut <- renderDataTable({
                          datatable(xchange(), options = list(dom = "t"))
                        })
                      }
                      
                      shinyApp(ui, server)
                      

                      Community Discussions

                      Trending Discussions on XChange
                      • Problems with moving an enemy towards a character in pygame
                      • Acton in for loop not affecting all sprites in a group
                      • Cannot set Context in open-xchange
                      • Property 'value' does not exist for $event.target.value in typescript/angularjs
                      • Javascript for a dynamic PDF stamp dialog box not working
                      • PDF Dropdown List that &quot;auto-populates&quot; Fields with values [using PDF X-Change Editor]?
                      • Parsing Json response value Python
                      • Sorting by different data members of a class C++
                      • What is the role of BOOL in the given code?
                      • PDF-XChange Editor SDK to merge multiple PDF with VBA (Excel)
                      Trending Discussions on XChange

                      QUESTION

                      Problems with moving an enemy towards a character in pygame

                      Asked 2022-Jan-01 at 16:02

                      I am having problems with making a homing algorithm to move an enemy towards a player in a game. For some reason, the algorithm works sometimes, but as you move the player around, the enemy gets to points where it just stops even though there is still a difference between the player x and y variables and the enemy x and y variables (which the code should be applying to the enemy at all times). If you run the code you'll see what I mean.

                      Here is my code:

                      import pygame
                      import sys, os, random
                      from pygame.locals import *
                      from pygame import mixer
                      import math
                      
                      clock = pygame.time.Clock()
                      
                      screen_width = 700
                      screen_height = 700 
                      screen = pygame.display.set_mode((screen_width, screen_height))
                      
                      player_rect = pygame.Rect(200, 200, 10, 10)
                      moving_left = False 
                      moving_right = False 
                      moving_down = False 
                      moving_up = False
                      
                      hunter_rect = pygame.Rect(500, 500, 48, 60)
                      
                      player_rect.x = 300 
                      player_rect.y = 200
                      while True:
                          screen.fill((50, 50, 50))
                      
                      
                          #screen.blit(player, (player_rect.x, player_rect.y))
                          #screen.blit(hunter, (hunter_rect.x, hunter_rect.y))
                          pygame.draw.rect(screen, (255, 255, 255), player_rect)
                          pygame.draw.rect(screen, (255, 0, 0), hunter_rect)
                      
                          #### getting the change in y and the change in x from enemy to player ###
                          ychange = (hunter_rect.y - player_rect.y)/100
                          xchange = (hunter_rect.x - player_rect.x)/100   
                      
                      
                          hunter_rect.x -= xchange
                          hunter_rect.y -= ychange
                      
                      
                          if moving_left:
                              player_rect.x -= 4
                          if moving_right:
                              player_rect.x += 4
                          if moving_up:
                              player_rect.y -= 4
                          if moving_down:
                              player_rect.y += 4
                      
                          for event in pygame.event.get():
                              if event.type == QUIT:
                                  sys.exit()
                                  pygame.quit()
                              if event.type == KEYDOWN:
                                  if event.key == K_ESCAPE:
                                      pygame.quit()
                                      sys.exit()
                                  if event.key == K_a:
                                      moving_left = True 
                                  if event.key == K_d:
                                      moving_right = True 
                                  if event.key == K_s:
                                      moving_down = True
                                  if event.key == K_w:
                                      moving_up = True
                              if event.type == KEYUP:
                                  if event.key == K_a:
                                      moving_left = False 
                                  if event.key == K_d:
                                      moving_right = False
                                  if event.key == K_w:
                                      moving_up = False 
                                  if event.key == K_s:
                                      moving_down = False
                          
                          pygame.display.update()
                          clock.tick(60) 
                      

                      ANSWER

                      Answered 2022-Jan-01 at 15:59

                      Since pygame.Rect is supposed to represent an area on the screen, a pygame.Rect object can only store integral data.

                      The coordinates for Rect objects are all integers. [...]

                      The fraction part of the movement gets lost when the movement is add to the position of the rectangle.
                      If you want to store object positions with floating point accuracy, you have to store the location of the object in separate variables and to synchronize the pygame.Rect object. round the coordinates and assign it to the location (e.g. .topleft) of the rectangle:

                      hunter_rect = pygame.Rect(500, 500, 48, 60)
                      hunter_x, hunter_y = hunter_rect.topleft
                      
                      # [...]
                      while True:
                          # [...]
                      
                          hunter_x -= xchange
                          hunter_y -= ychange
                          hunter_rect.topleft = round(hunter_x), round(hunter_y)
                      
                          # [...]
                      

                      Source https://stackoverflow.com/questions/70549998

                      Community Discussions, Code Snippets contain sources that include Stack Exchange Network

                      Vulnerabilities

                      No vulnerabilities reported

                      Install XChange

                      You can download it from GitHub, Maven.
                      You can use XChange like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the XChange component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

                      Support

                      Please report any bugs or submit feature requests to XChange's Github issue tracker.

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