canvas.pack,canvaspack参数

python新手提问 谢谢大神了

这个报错的原因是你的缩进少了，导致 draw() 方法不在 Ball类 里面， 办法是从17到27行全部再往后缩进一个单位。不幸的是，我刚调试了一下，你这段代码不光是有这一个问题。靠你自己慢慢找了。

python canvas 拖拽和移动\事件

"""

draw elastic shapes on a canvas on drag, move on right click;

see canvasDraw_tags*.py for extensions with tags and animation

"""

from tkinter import *

trace = False

class CanvasEventsDemo:

def init (self, parent=None):

canvas = Canvas(width=300, height=300, bg='beige')

canvas.pack()

canvas.bind('ButtonPress-1', self.onStart) # click

canvas.bind('B1-Motion', self.onGrow) # and drag

canvas.bind('Double-1', self.onClear) # delete all

canvas.bind('ButtonPress-3', self.onMove) # move latest

self.canvas = canvas

self.drawn = None

self.kinds = [canvas.create_oval, canvas.create_rectangle]

if name == ' main ':

CanvasEventsDemo()

mainloop()

from tkinter import *

def onCanvasClick(event):

print('Got canvas click', event.x, event.y, event.widget)

def onObjectClick(event):

print('Got object click', event.x, event.y, event.widget, end=' ')

print(event.widget.find_closest(event.x, event.y)) # find text object's ID

root = Tk()

canv = Canvas(root, width=100, height=100)

obj1 = canv.create_text(50, 30, text='Click me one')

obj2 = canv.create_text(50, 70, text='Click me two')

canv.bind('Double-1', onCanvasClick) # bind to whole canvas

canv.tag_bind(obj1, 'Double-1', onObjectClick) # bind to drawn item

canv.tag_bind(obj2, 'Double-1', onObjectClick) # a tag works here too

canv.pack()

root.mainloop()

python的tkinter库，求详细用法

tkinter是Python中最有用的库之一，以下有它的详细用法：

准备（必做）：

import tkinter

Windows=tkinter.Tk()

canvas=tkinter.Canvas(Windows,width=数字,height=数字)

canvas.pack()

读取图片：变量名=tkinter.PhotoImage(file='....')

放出图片：变量名1=canvas.create_image(数字,数字（两个数字表示坐标）,image=变量名,anchor="nw或ne或sw或se或不写，表示锚点")

Windows.title("欢迎") 设置窗口名

canvas.update()更新画面

canvas.delete(变量名1)删除图片

坐标=canvas.coords(变量名1)获取坐标

canvas.itemconfig(改什么，改成什么) 改图片

canvas.move(移什么,x坐标移多少,y坐标移多少)

10.id=canvas.create_text(x坐标,y坐标,text=写什么,fill='填充',font=('字体',字号))

这十个够用一段时间了

希望我的回答能够帮助到您！如果赞同我的观点请您采纳哦！

python 怎么写双人弹球游戏

用python? tkinter模块做一个击打反弹球和球拍的游戏。球在屏幕上飞，玩家需要把它击打回去，只要球落到屏幕底部，游戏就结束。

首先我们做一个在屏幕上到处移动的小球：

#coding:utf-8

from?tkinter?import?*

import?random

import?time

class?Ball:

????#创建一个球类

????def?__init__(self,?canvas,?color):

????????self.canvas?=?canvas

????????self.id?=?canvas.create_oval(10,?10,?25,?25,?fill=color)

????????#返回刚好划小球的id，create_oval创建一个椭圆

????????self.canvas.move(self.id,?245,?100)

????????#把椭圆移动到画布

????????starts?=?[-3,?-2,?-1,?1,?2,?3]

????????random.shuffle(starts)

????????#随机排列

????????self.x?=?starts[0]

????????self.y?=?-3

????????self.canvas_height?=?self.canvas.winfo_height()

????????#获取画布当前高度

????????self.canvas_width?=?self.canvas.winfo_width()

????????#获取画布当前宽度

????def?draw(self):

????????self.canvas.move(self.id,?self.x,?self.y)

????????#让小球水平和垂直移动

????????pos?=?self.canvas.coords(self.id)

????????#coords返回画布上画好的x和y坐标

????????#判断小球是否撞到画布顶部或者底部，保证小球反弹回去，不消失

????????if?pos[1]?=?0:

????????????self.y?=?3

????????if?pos[3]?=?self.canvas_height:

????????????self.y?=?-3

????????if?pos[0]?=?0:

????????????self.x?=?3

????????if?pos[2]?=?self.canvas_width:

????????????self.x?=?-3

tk?=?Tk()

tk.title("Game")

tk.resizable(0,?0)

#窗口大小不可调整

tk.wm_attributes("-topmost",?1)

#使画布窗口置于所有窗口之前

canvas?=?Canvas(tk,width=500,?height=400,?bd=0,?highlightthickness=0)

#bd和highlighttthickness是为了保证画布没有边框

canvas.pack()

tk.update()

#动画初始化

ball?=?Ball(canvas,?'red')

while?1:

????#画布一出现会马上消失，为了防止画布消失，用tkinter一直重画

????ball.draw()

????tk.update_idletasks()

????tk.update()

????time.sleep(0.01)

一个会动的小球就做好啦

效果图如下，只是它会动(￣3￣) !

python canvas画布

"demo all basic canvas interfaces"

from tkinter import *

canvas = Canvas(width=525, height=300, bg='white') # 0,0 is top left corner

canvas.pack(expand=YES, fill=BOTH) # increases down, right

canvas.create_line(100, 100, 200, 200) # fromX, fromY, toX, toY

canvas.create_line(100, 200, 200, 300) # draw shapes

for i in range(1, 20, 2):

canvas.create_line(0, i, 50, i)

canvas.create_oval(10, 10, 200, 200, width=2, fill='blue')

canvas.create_arc(200, 200, 300, 100)

canvas.create_rectangle(200, 200, 300, 300, width=5, fill='red')

canvas.create_line(0, 300, 150, 150, width=10, fill='green')

photo=PhotoImage(file='../gifs/ora-lp4e.gif')

canvas.create_image(325, 25, image=photo, anchor=NW) # embed a photo

widget = Label(canvas, text='Spam', fg='white', bg='black')

widget.pack()

canvas.create_window(100, 100, window=widget) # embed a widget

canvas.create_text(100, 280, text='Ham') # draw some text

mainloop()