bool使用__bool__方法,对于零大小的Vector2d返回False,否则返回True。 Vector2d来自示例 11-1,在vector2d_v0.py中实现(示例 11-2)。 该代码基于示例 1-2,除了+和*操作的方法,我们稍后会看到在第十六章中。 我们将添加==方法,因为它对于测试很有用。 到目前为止,Vector2d使用了几个特殊方法来提供 Pythonist...
In general, a function takes arguments (if any), performs some operations, and returns a value (or object). The value that a function returns to the caller is generally known as the function’s return value. All Python functions have a return value, either explicit or implicit. You’ll ...
Basic Usage of subprocess With Windows Shells In this section, you’ll cover basic use of the shell with subprocess in a Windows environment. To run a shell command using run(), the args should contain the shell that you want to use, the flag to indicate that you want it to run a sp...
vector2d_v0.py:到目前为止,所有方法都是特殊方法 fromarrayimportarrayimportmathclassVector2d:typecode='d'# ①def__init__(self,x,y):self.x=float(x)# ②self.y=float(y)def__iter__(self):return(iforiin(self.x,self.y))# ③def__repr__(self):class_name=type(self).__name__return'{...
print(psutil.disk_usage('C:\\')) 而去获取所有磁盘的信息,调用的则是disk_partitions()方法 print(psutil.disk_partitions()) 另外我们也还能够获取到系统的启动时间 from datetime import datetime print(u"系统启动时间: %s" % datetime.fromtimestamp(psutil.boot_time()).strftime("%Y-%m-%d %H:%M:%S...
Although they're defined using different decorators, their usage is similar in Python code. Connection strings or secrets for trigger and input sources map to values in the local.settings.json file when they're running locally, and they map to the application settings when they're running in ...
How to achieve the usage of each CPU by 100%? from multiprocessing import Pool def f(x): return x*x if __name__ == '__main__': pool = Pool(processes=4) result = pool.map(f, range(10000000)) python multiprocessing cpu-usage pool Share Improve this question Follow edited Jan 25...
>>>importpsutil>>>psutil.disk_partitions()#获取当前磁盘完整信息[sdiskpart(device='C:\\',mountpoint='C:\\',fstype='NTFS',opts='rw,fixed'),sdiskpart(device='D:\\',mountpoint='D:\\',fstype='NTFS',opts='rw,fixed')]>>>psutil.disk_usage("C:\\")#获取指定分区(参数)的使用情况sdi...
Although they're defined using different decorators, their usage is similar in Python code. Connection strings or secrets for trigger and input sources map to values in the local.settings.json file when they're running locally, and they map to the application settings when they're running in ...
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