importthreadingimportrequests deffetch_url(url):response=requests.get(url)print(f'获取 {url} 的响应: {response.status_code}')urls=['https://www.example.com','https://www.python.org','https://www.github.com']threads=[]forurlinurls:thread=threading.Thread(target=fetch_url,args=(url,))t...
The second line specifies what we want to do in this loop, i.e. in each iteration we want to add a new column containing the iterator i times the value three. The variable name of this new column should be called like the iterator. ...
在上面的代码中,Tensor 绑定的方法来自 torch::autograd::variable_methods,这个列表在 csrc/autograd/generated/python_variable_methods.cpp中: PyMethodDef variable_methods[] = { {"__add__", (PyCFunction)THPVariable_add, METH_VARARGS | METH_KEYWORDS, NULL}, {"__radd__", (PyCFunction)THPVariable_...
Building our OwnFunctions.We create a new function using the def keyword followed by optional parameters in parentheses.We indent the body of the function.This defines the function but does not execute the body of the function Argements is input.A parameter is a variable which we use in the ...
Note python has this really weird error if you define local variable in a function same name as the global variable, program will promptUnboundLocalError. child class object overrides parent class methods input: classfruit:defprint(self):print('a')defeat(self):print('b')classapple(fruit):defpr...
# query the website and return the html to the variable 'page'page = urllib.request.urlopen(urlpage)# parse the html using beautiful soup and store in variable 'soup'soup = BeautifulSoup(page, 'html.parser') 我们可以在这个阶段打印soup变量,它应该返回我们请求网页的完整解析的html。 print(soup...
(directory,link)finally:self.queue.task_done()defmain():ts=time()client_id=os.getenv('IMGUR_CLIENT_ID')ifnot client_id:raiseException("Couldn't find IMGUR_CLIENT_ID environment variable!")download_dir=setup_download_dir()links=get_links(client_id)# Create a queue to communicatewiththe ...
通常,对get_event_loop()的简单调用将返回系统解释器正在运行的最佳事件循环实现。 一旦我们创建了循环,现在我们通过使用create_task()方法向事件循环提交了一些任务。这将任务添加到事件循环的队列中以执行。现在,由于这些任务是异步的,我们不知道哪个任务会首先产生结果,因此我们需要提供一个回调来处理任务的结果。为了...
pack() # Create the application variable. self.contents = tk.StringVar() # Set it to some value. self.contents.set("this is a variable") # Tell the entry widget to watch this variable. self.entrythingy["textvariable"] = self.contents # Define a callback for when the user hits return...
A loop variable, which is also known as the iterator. This variable is incremented or decremented with each new iteration of the loop. It is not necessary to define the loop variable beforehand. Python creates this variable when it is first used. The keyword in. A sequence to constrain how...