Python 练习实例55

Python 练习实例57

Python 练习实例56

Python 100例

题目：画图，学用circle画圆形。　　　

程序分析：无。

程序源代码：

实例(Python 2.0+)

#!/usr/bin/python # -*- coding: UTF-8 -*- if __name__ == '__main__': from Tkinter import * canvas = Canvas(width=800, height=600, bg='yellow') canvas.pack(expand=YES, fill=BOTH) k = 1 j = 1 for i in range(0,26): canvas.create_oval(310 - k,250 - k,310 + k,250 + k, width=1) k += j j += 0.3 mainloop()

以上实例输出结果为：

Python 100例

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Python 练习实例55

Python 练习实例57

3 篇笔记 写笔记

1. #0

      丸子酱

     105***[email protected]

   7

   使用 turtle 模块 ：

   #usr/bin/env python
   #coding:utf-8
   
   if __name__ == '__main__':
       import turtle
       turtle.title("画圆")
       turtle.setup(800,600,0,0)
       pen=turtle.Turtle()
       pen.color("yellow")
       pen.width(5)
       pen.shape("turtle")
       pen.speed(1)
       pen.circle(100)
   

   丸子酱

      丸子酱

     105***[email protected]

   9年前 (2017-05-22)
2. #0

      ngdy

     374***[email protected]

   12

   画出10个半径依次增加定长的同心圆:

   #!/usr/bin/python
   # -*- coding: UTF-8 -*-
   
   import numpy as np
   import matplotlib.pyplot as plt
   
   x = y = np.arange(-11, 11, 0.1)
   x, y = np.meshgrid(x,y)
   #圆心为（0，0），半径为1-10
   for i in range(1,11):
      plt.contour(x, y, x**2 + y**2, [i**2])
      #如果删除下句，得出的图形为椭圆
      plt.axis('scaled')
   plt.show()

   ngdy

      ngdy

     374***[email protected]

   8年前 (2017-11-27)
3. #0

      ngdy

     374***[email protected]

   3

   import math as m
   import matplotlib.pyplot as plt
   
   x=[]
   y=[]
   for a in range(1,11):
       for b in range(0,360):
           x.append(a*(m.cos(m.pi*(b/180))))
           y.append(a*(m.sin(m.pi*(b/180))))
   plt.scatter(x,y,s=30)
   plt.axis([-11,11,-11,11])
   #避免因比例而压缩为椭圆
   plt.axis('equal') 
   plt.show()

   ngdy

      ngdy

     374***[email protected]

   8年前 (2017-11-28)

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/g,"
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		noteContent = noteContent.replace(//g,"
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		// 系列化表单数据
		var comment_parent = 0;
		var is_user_logged_in = $("#is_user_logged_in").val();
		var comment_post_ID =  14234;
		var _wp_unfiltered_html_comment = $("#_wp_unfiltered_html_comment").val();
		var comment = noteContent;
		var author = $("#author").val();
		var url = $("#url").val();
		var email = $("#email").val();
		if(isBlank(author) && is_user_logged_in==0) {
			statusdiv.html('
请输入昵称！
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		} else if(isBlank(email)  && is_user_logged_in==0) {
			statusdiv.html('
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			// 异步提交
			$.ajax({
					type: 'post',
					url: formurl,
					dataType:'json',
					data: {"comment_parent":comment_parent,"comment_post_ID":comment_post_ID, "_wp_unfiltered_html_comment":_wp_unfiltered_html_comment,"comment":comment,"url":url, "email":email,"author":author},
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').show();
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					commentform.find('textarea[name=comment]').val('');
				}
			});
			setTimeout(function(){
		        $("#submit").prop('disabled', false);
		    }, 10*1000);
		}
		return false;

	});
	$(".comt-author").click(function() {
		href = $(this).children("a").attr("href");
		if(href.indexOf("/note/")!=-1) {
			var win = window.open(href, '_blank');
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	$(".comt-meta span").hover(function(){
		$(this).children(".tooltip").css({ "opacity": 1, "pointer-events": "auto"});
	},function(){
		$(this).children(".tooltip").removeAttr("style");
	});
	/*
	$(".wrapper i").hover(function(){
		$(this).siblings(".tooltip").css({ "opacity": 1, "pointer-events": "auto"});
	},function(){
		$(this).siblings(".tooltip").css({ "opacity": 0, "pointer-events": "auto"});
	});
	*/
	//Upvote.create('runoobvote-id', {callback: vote_callback});
	var ajaxurl = 'https://www.runoob.com/wp-admin/admin-ajax.php';
	var callback = function(data) {
		//console.log($('#runoobvote-id').upvote('upvoted'));
		//console.log($('#runoobvote-id').upvote('downvoted'));
		//console.log(data);
		_vote_action = data.action;
		id_arr = data.id.split('-');
		um_id= id_arr[2];
		//console.log(um_id);
		
		var re = /^[1-9]+/;
		if (re.test(um_id)) { 
			var ajax_data = {
				_vote_action: _vote_action,
				action: "pinglun_zan",
				um_id: um_id,
				um_action: "ding"
			};
			//console.log(ajax_data);
			$.post(ajaxurl,ajax_data,function(status){
				//if(status.vote_num>999) {
				//	_voteHtml = ''+kFormatter(status.vote_num) +'';
				//	$("#runoobvote-id-" + um_id + " .count").hide().after(_voteHtml);
				//}
				
			});
		}
	};
	if($('#comments').length && $('.upvotejs').length){
		$('.upvotejs').upvote({id: 14234, callback: callback});
	
		$.post(ajaxurl,{"action":"pinglun_zan","postid":14234},function(data){  
			$(data).each(function(key,value) {
				$("#runoobvote-id-" + value.commid + " .upvote").addClass(value.upvotejs_class);
				$("#runoobvote-id-" + value.commid + " .downvote").addClass(value.downvote_class);
				$("#runoobvote-id-" + value.commid + " .count").text(value.upvote_count);
			})
		},'json');
		
	}
	
	
});
function isBlank(str) {
    return (!str || /^\s*$/.test(str));
}
function kFormatter(num) {
	// return num;
    return Math.abs(num) > 999 ? Math.sign(num)*((Math.abs(num)/1000).toFixed(1)) + 'k' : Math.sign(num)*Math.abs(num)
}