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In this article, we are going to learn how to validate a form in django. Django comes with build-in validators for forms. We can use them in the tutorial to validate forms.You must familiar with the Django to follow along with this tutorial. If you are not familiar with Django, then this article is not for you.Set up the basic Django project with the following commands.mkdir form_validation cd form_validation python -m venv env (Activate environment based on your OS) pip install django===3.0 django-admin startproject form_validation . (Don't forget dot(.) at the end) python manage.py startapp ... Read More
In this article, we are going to scrape the text from Wikipedia's Infobox using BeatifulSoup and requests in Python. We can do it in 10 mins. It's straightforward.We need to install bs4 and requests. Execute the below commands to install.pip install bs4 pip install requestsFollow the below steps to write the code to fetch the text that we want from the infobox.Import the bs4 and requests modules.Send an HTTP request to the page that you want to fetch data from using the requests.get() method.Parse the response text using bs4.BeautifulSoup class and store it in a variable.Go to the Wikipedia page ... Read More
IntroductionCURL context options are available when the CURL extension was compiled using the --with-curlwrappers configure option. Given below is list of CURL wrapper context optionsMethodDescriptionmethodHTTP method supported by the remote server. Defaults to GET.headerAdditional headers to be sent during requestuser_agentValue to send with User-Agent: header.contentAdditional data to be sent after the headers. This option is not used for GET or HEAD requests.proxyURI specifying address of proxy server.max_redirectsThe max number of redirects to follow. Defaults to 20.curl_verify_ssl_hostVerify the host. Defaults to FALSE. available for both http and ftp protocol wrappers.curl_verify_ssl_peerRequire verification of SSL certificate used. Defaults to FALSE. available for both ... Read More
Suppose we are considering an infinite number line, here the position of the i−th stone is given by array stones and stones[i] is indicating ith stone position. A stone is an endpoint stone if it has the smallest or largest position. Now in each turn, we pick up an endpoint stone and move it to an unoccupied position so that it is no longer an endpoint stone.If the stones are at say, stones = [1, 2, 5], we cannot move the endpoint stone at position 5, because moving it to any position (such as 0, or 3) will still keep ... Read More
Suppose we have an array A of integers; we have to find the maximum sum of elements in two non−overlapping subarrays. The lengths of these subarrays are L and M.So more precisely we can say that, we have to find the largest V for whichV = (A[i] + A[i+1] + ... + A[i+L-1]) + (A[j] + A[j+1] + ... + A[j+M-1]) and either −0 = 0, decrease i by 1, decrease j by 1, do −rightL[i + 1] := max of temp and x where x is 0 if i + 2 >= n otherwise x = rightL[i + 2]temp ... Read More
PowerShell modules are stored in their module path. Module paths can be retrieved using an environmental variable $env:PSModulePath. To get a better view, we will split the variable path with a semicolon.$env:PSModulePath -split ';' C:\Users\Administrator\Documents\WindowsPowerShell\Modules C:\Program Files\WindowsPowerShell\Modules C:\Windows\system32\WindowsPowerShell\v1.0\ModulesYou can see the 3 paths above. Each path has Modules stored as per their scopes.Documents Path: Modules are stored in this path when you provide the scope – CurrentUser while installing the module.Program files path: Modules are stored in this path when AllUsers Scope is provided.System32 path: It is the default path for the module. Whenever Microsoft updates any PowerShell version or module, it ... Read More
To know which parameters are supported by cmdlets, Get-Command retrieves the properties of the command. For example, We need to find the Get-Process parameters so the Get-Command will retrieve the command information and Full List will provide you the properties.Get-Command Get-Process | flOnce you run the command, it shows the ParameterSets property and they are the parameters supported by cmdlets.PS C:\> (Get-Command Get-Process).ParameterSets |ft -AutoSize Name IsDefault Parameters ---- --------- ---------- Name True {Name, ComputerName, Module, FileVersionInfo..} ... Read More
Split-Path is to retrieve the part of the specified path, such as a parent folder, a subfolder, or a file name. It can also tell if the path is relative or absolute.This command supports a few parameters which help to retrieve the part of the specified path. Consider we have below executable file path and we will see how the Split-Path command will retrieve the parent folder and subfolder as well as the root directory.'C:\Temp\PsExec.exe'Default Split-Path command will retrieve the parent folder name of the file.PS C:\> Split-Path 'C:\Temp\PsExec.exe' C:\TempHere the default parameter is -Parent, which retrieves the parent folder path. Above command ... Read More
Ipconfig /all command also retrieves the DNS settings for all the network interfaces. This command can be run on both cmd and PowerShell. For example, ExamplePS C:\Users\Administrator> ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : Test1-Win2k16 Primary Dns Suffix . . . . . . . : labdomain.local Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . ... Read More
To get the IP address of the system we can use IPConfig command in cmd and the same command can be used in PowerShell. IPConfig command shows all the connected and disconnected adapters including IPv4 and IPv6. For example, ExamplePS C:\Users\Administrator> Ipconfig Windows IP Configuration Ethernet adapter Ethernet0: Connection-specific DNS Suffix . : IPv4 Address. . . . . . . . . . . : 192.168.0.104 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 Tunnel adapter isatap.{27E40122-664A-404D-A4C9-4E48C0363BC5}: ... Read More