第五章:异步编程 除了顺序和并行执行模型之外,还有一个与事件编程概念一起具有基本重要性的第三个模型:异步模型。 异步任务的执行模型可以通过单一的主控制流来实现,无论是在单处理器系统还是多处理器系统中。在并发异步执行模型中,各种任务的执行在时间线上交叉,并且一切都发生在单一控制流(单线程)的作用下。一旦...
How to Code a Heart Using Python's Turtle Library - Drawing the Heart Shape To code a heart shape using Python's Turtle library, we'll use a series of turtle movements to trace out the outline of the heart. Here are the steps to code a heart shape in Python’s Turtle. Step 1: Se...
How the One-File Program Works The bootloader is the heart of the one-file bundle also. When started it creates a temporary folder in the appropriate temp-folder location for this OS. The folder is named _MEIxxxxxx, where xxxxxx is a random number. The one executable file contains an em...
setIcon(QIcon("heart.svg")) # set the icon of the systemTrayIcon self.createActions( ) self.createTrayMenu( ) self.connect(self, SIGNAL("doubleClicked"), self.window, SLOT("showNormal")) #self.connect(self, SIGNAL("activated( )"), self, SLOT("slot_iconActivated")) def createActions...
A blockchain, at its heart, is a distributed ledger that is maintained by a network of nodes. Each node has its own copy of the ledger, and transactions are confirmed and added to it via a consensus mechanism. One of the most significant advantages of blockchain is that it is immutable...
# coding:utf-8fromturtleimport*defnose(x,y):#鼻子pu()goto(x,y)pd()seth(-30)begin_fill()a=0.4foriinrange(120):if0<=i<30or60<=i<90:a=a+0.08lt(3)#向左转3度fd(a)#向前走a的步长else:a=a-0.08lt(3)fd(a)end_fill()pu()seth(90)fd(25)seth(0)fd(10)pd()pencolor(255,155...
I'm trying to transpose a matrix in C while passing the matrix to a function and return a pointer to a transposed matrix. What am I doing wrong in the second while loop? in main create matrix transpos...Append a node in a linkedlist - why segmentation error? I am implementing a linke...
当然作为业余选手,也不必有太大压力,主要还是follow your heart,如果只是做一些自用的小程序,代码揉成在一个文档的确省时省力,没必要搞什么过于复杂的框架。但是有些需要可能经常需要维护的代码,还是要做好注释,免得维护代价很高。 下面就简单讲一下这期的内容,题目如下: ...
一、Heartrate alexmojaki/heartrate: Simple real time visualisation of the execution of a Python program. (github.com) 该库提供了Python程序执行的简单实时可视化: 演示 左边的数字是每行被击中的次数。条形显示最近被击中的线条 - 更长的条形表示更多的点击,较浅的颜色意味着更近。 安装 pip install -...
Create and view a simple DataFrame import pandas as pd from pandasgui import show df = pd.DataFrame(([[1, 2, 3], [4, 5, 6], [7, 8, 9]]), columns=['a', 'b', 'c']) show(df) If you are running your code as a script instead of in IPython or Jupyter, you need to do...