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To remove items (elements) from a list in Python, use the list functions clear(), pop(), and remove(). You can also delete items with the del statement by specifying a position or range with an index or slice.

In this article, we will show you how to remove an object/element from a list using python. The following are the 4 different methods to accomplish this task −

Using remove() method

Using del keyword

Using pop() method

Using clear() method

Assume we have taken a list containing some elements. We will return a resultant list after removing the given item from an input list using different methods as specified above.

Method 1: Using remove() method

The remove() function deletes the given item passed as an argument to it. −

Syntax list.remove(element) Return Value:The remove() function will not return any value(returns None) Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task

Create a variable to store the input list.

Use the remove() method to remove the particular item from the input list by passing the list item to be deleted as an argument to it and applying it to the input list.

Print the result list after removing the specified item from the input list

Example

The following program removes the specified item from an input list using the remove() method and prints the resultant list −

inputList

=

[

‘TutorialsPoint’

,

‘Python’

,

‘Codes’

,

‘hello’

,

‘everyone’

]

inputList

.

remove

(

“TutorialsPoint”

)

print

(

“Input List after removing {TutorialsPoint}:n”

,

inputList

)

Output

On executing, the above program will generate the following output −

Input List after removing {TutorialsPoint}: ['Python', 'Codes', 'hello', 'everyone']

As an input to the code, we were given a sample list with some random values, as well as an object/element to remove from the list. The element was then passed to the remove() method, where it was deleted/removed from the list. If the object/element is not found in the list, a value error will be returned.

Method 2: Using del Keyword

The del statement is not a List function. The del statement can be used to delete items from the list by passing the index of the item (element) to be deleted

Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task −

Create a variable to store the input list.

Use the del keyword, to remove the item present at the specified index (here 2nd index(Codes)) from the list.

Print the resultant list i,e after removing the specified item from the list.

Example

The following program removes the specified item from an input list using the del keyword and prints the resultant list −

inputList

=

[

‘TutorialsPoint’

,

‘Python’

,

‘Codes’

,

‘hello’

,

‘everyone’

]

del

inputList

[

2

]

print

(

“Input List after removing the item present at the 2nd index{Codes}:n”

,

inputList

)

Output

On executing, the above program will generate the following output −

Input List after removing the item present at the 2nd index{Codes}: ['TutorialsPoint', 'Python', 'hello', 'everyone'] Method 3: Using pop() method

With pop() method, you can delete the element at the specified position and retrieve its value.

The starting value of the index is 0 (zero-based indexing).

If no index is specified, the pop() method removes the last element from the list.

Negative values can be used to represent the position from the end. The last index is -1.

Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task −

Create a variable to store the input list.

Use the pop() method, bypassing the index of a list item as an argument the to it to remove the item at the given index

Pass the negative index values as an argument to the pop() method, to remove the list items from the last. Here for removing the last item from the list we passed the -1 index as an argument to the pop() method.

Print the resultant list i,e after removing the specified item from the list.

Example

The following program removes the specified item from an input list using the pop() method and prints the resultant list −

inputList

=

[

‘TutorialsPoint’

,

‘Python’

,

‘Codes’

,

‘hello’

,

‘everyone’

]

del_item

=

inputList

.

pop

(

0

)

last_del_item

=

inputList

.

pop

(

1

)

print

(

“Input List after removing {TutorialsPoint}, {everyone}:n”

,

inputList

)

Output Input List after removing {TutorialsPoint}, {everyone}: ['Python', 'Codes', 'hello'] Method 4: Using clear() method

The clear() method removes all items from the list. The list is still there, but it is empty.

Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task −

Create a variable to store the input list.

Use the clear() method, to remove all the items from the list.

Print the resultant list i,e after removing all the from the list.

Example

The following program clears or empties the complete list using the clear() function −

inputList

=

[

‘TutorialsPoint’

,

‘Python’

,

‘Codes’

,

‘hello’

,

‘everyone’

]

inputList

.

clear

(

)

print

(

“Input List after removing all the items:”

,

inputList

)

Output Input List after removing all the items: [] Conclusion

We learned how to remove an object/element from a list using four different methods in this article: remove(), pop(), clear(), and the del keyword. We also learned about the errors that those methods generate if the element is not in the list.

You're reading How To Remove An Object From A List In Python?

How To Remove Options From A Dropdown List With Javascript?

This tutorial teaches us how to remove the options from a dropdown list using JavaScript. Usually, this is not frequent that users get the option to remove any option from the dropdown list but this is possible if the option is provided by the programmer.

If the programmer wants to provide the option to remove the dropdown then in JavaScript it is possible with the help of the remove() method. Using the DOM user can select the option to remove and by providing a function it could be passed to the remove method which will remove it. Let’s look into detail and understand the whole process.

Syntax

Syntax of the remove() method is −

var element = document.getElementById( "selectNow" ); element.remove( element.selectedIndex );

In the above syntax, “selectNow” is the id of the dropdown list in which the options are defined. We have used the ‘getElementById’ method of the DOM to get the dropdown list and stored that in a variable.

After that by using the function remove() we deleted ‘selectedIndex’ element by passing it as remove() function’s parameter. Also, ‘selectedIndex’ will return the option we want to delete and we have to select it before deleting it.

Note − ‘selectedIndex’ is the predefined method that will return the value of the index which is selected by the user.

Algorithm

We have seen the syntax for removing an option from the list, let’s see the complete algorithm step by step to understand it in a better way −

Creating form or dropdown menu

In these steps, we will create the form in which we will define or create the dropdown and a button that will call the function to delete the object from the dropdown list.

Defining script or function to remove

In the defined function we will create a variable to store the return value from the call to the ‘document.getElementById()’ method.

We will pass the ‘id’ of the above-defined dropdown as the parameter to the call to the ‘document.getElementById()’ method.

By using the remove method with the variable (which contains the return value of the call to the method) and passing the parameter the option to delete by using the ‘selectedIndex’ method we will delete the required option.

These are the basic steps to delete an option from the dropdown, now let’s see some examples to get a better understanding of the above-defined steps. 

Example

In this example, we are going to implement the above-defined algorithm step by step to delete the elements for the given dropdown menu, let’s implement the code −

function

fun_remove

(

)

{

var

element

=

document

.

getElementById

(

“id_dropdown”

)

;

element

.

remove

(

element

.

selectedIndex

)

;

}

Conclusion

In this article, we have learned the method to remove the option from the dropdown menu. This is only possible if while defining the dropdown menu programmer defines or creates a button for the user to remove the options. To remove any option user have to select it and by using the remove() function and getting the element by ‘getElementById’ and ‘selectedIndex’ methods the user can remove it.

Python Program To Remove And Print Every Third From List Until It Becomes Empty?

In this article, we will learn how to remove and print every third element or item from the list until it becomes empty using Python Program.

First we create a list, the index of the starting address is 0 and the position of the first third element is 2 and need to traverse till the list becomes empty and another important work to do every time we have to find the index of the next third element and print the value and after that reduce the length of the list.

Input-Output Scenario

Following is the input and its output scenario for removing and printing every third element from the list until it becomes empty −

Input: [15,25,35,45,55,65,75,85,95] Output : 35,65,95,45,85,55,25,75,15

Here, the first third element is 35, following which we begin counting from 44 for the second third element, which is 65, and so on until 95 is reached. The count again begins at 15 for the subsequent third element, which is 45. By continuing in the same way as before, we arrive to the third element following 45, which is 85. Up until the list is completely empty, this process is repeated.

Algorithm

Following is an algorithm or approach of how to remove and print every third element or item from the list until it becomes empty −

The index of the list starts from 0 and the first third element will be at position 2.

Find the length of the list.

Traverse till the list becomes empty and each time find the index of the next third element.

End of the program.

Example

with user input

Following is an illustration of the above explained steps −

def

removenumber

(

no

)

:

p

=

3

-

1

id

=

0

lenoflist

=

(

len

(

no

)

)

id

=

(

p

+

id

)

%

lenoflist

print

(

no

.

pop

(

id

)

)

lenoflist

-=

1

A

=

list

(

)

n

=

int

(

input

(

"Enter the size of the array ::"

)

)

print

(

"Enter the INTEGER number"

)

for

i

in

range

(

int

(

n

)

)

:

p

=

int

(

input

(

"n="

)

)

A

.

append

(

int

(

p

)

)

print

(

"After remove third element, The List is"

)

removenumber

(

A

)

Output

Following is an output of the above code −

Enter the size of the array ::9 Enter the number n=10 n=20 n=30 n=40 n=50 n=60 n=70 n=80 n=90 After remove third element, The List is 30 60 90 40 80 50 20 70 10 Example

with static input

Following is an example for removing and printing every third element from the list until it becomes empty by providing static input −

def

removenumber

(

no

)

:

p

=

3

1

id

=

0

lenoflist

=

(

len

(

no

)

)

id

=

(

p

+

id

)

%

lenoflist

print

(

no

.

pop

(

id

)

)

lenoflist

-=

1

elements

=

[

15

,

25

,

35

,

45

,

55

,

65

,

75

,

85

,

95

]

removenumber

(

elements

)

Output

Following is an output of the above code −

35 65 95 45 85 55 25 75 15

How To Remove A Password From A Pdf In Windows

We often receive PDF files that are password protected for security reasons. Think of bank statements, tax records, medical data, and confidential business reports. A protected PDF’s password can be removed as long as the document’s access permissions aren’t very strict. Getting rid of this password frees you from having to remember it and allows you to create duplicates for sharing. The following are some of the best ways to remove a password from a PDF in Windows 11 and Windows 10.

Dealing with a non-editable PDF? Make it editable by converting the PDF to a Word document!

How to Remove a Password From a PDF Using Desktop Tools

You can accomplish password removal from a PDF using a variety of installed apps and tools in Windows, including PDF readers and editors, Microsoft Office programs such as Word, and screen capture/recording software.

1. Print a New PDF Using a PDF Reader

This technique can be used with any PDF reader installed on Windows: Adobe Acrobat Reader DC, Foxit PDF Reader, Nitro PDF Reader, PDF Xchange, Sumatra PDF, Slim PDF, etc. The method is very simple: you just need to create a fresh PDF print and save it to your computer.

Open the password-protected PDF file using your favorite PDF reader.

Enter the required password to gain document access.

Note: you can’t proceed with the next few steps if you don’t remember the password of your PDF file.

After creating a new PDF file, give it a desirable name. You can open this document from your PC as an unlocked PDF file – no password is needed.

2. Save as a PDF in Word

If you have a newer version of Word (Office 2023 and beyond), you would have noticed that it renders PDF files rather beautifully and can save in the same format. The trick is to open the password-protected PDF file in Word and save it as a PDF once again.

Note: don’t select the option “Always use Word to open .pdf files.” This setting is for one-time use only.

You will be asked to enter your password for the secure PDF document, then the PDF file will open in Word.

Instead of “.doc” or “.docx,” save the Word document as a PDF file using the option found in the “Save as type” drop-down menu.

3. Use Scrolling Screenshots

Windows offers many different ways to capture scrolling screenshots of multiple app screens from top to bottom. These screenshots are saved in JPG or PNG format and can later be converted to a PDF file using online tools. For this demonstration, we are using ShareX, which is easy to download and install on any Windows 11/10/8.1/7 device.

Once the entire PDF file has been captured as a screenshot, save the result as a JPG or PNG image.

When the output image is ready, convert it to a PDF file once again using an online tool such as PDF2Go or your original screen capture software if it has the option to save the image directly as a PDF file.

4. Use a PDF Editor’s Remove Security Feature

This is a paid option that you can only access if you’ve subscribed to premium PDF editor software. Adobe Acrobat Pro, Foxit PDF Editor (formerly PhantomPDF), and EaseUS PDF Editor have a superb feature called “Remove Security,” which can be accessed from their Encryption or Protection menu tabs.

Tip: learn how to compress PDF documents on desktop and mobile.

How to Remove a Password from a PDF Using Online Tools

There are many online tools that allow you to remove a PDF password on a browser installed on a Windows device. These methods work well for most modern browsers, such as Google Chrome, Microsoft Edge, and Mozilla Firefox.

1. Using Google Drive and Google Docs

Google Drive and Google Docs are capable of opening and saving PDF files, including those that are password-protected. To remove the password, import the file into Google Drive, then open and save it in Google Docs.

Import the PDF using the “File Upload” menu under “New” (the button with a big “+” sign.)

Enter the document’s password in Google Drive to view it.

Open the document with Google Docs, which is always available as a connected app.

2. Using Smallpdf

Smallpdf has an Unlock PDF option that quickly creates a new PDF file with the password removed.

When asked to enter your password, check the option for “remove password protection” to disable any passwords in the newly created PDF file.

Wait a few seconds for the password removal to be processed.

3. Using iLovePDF

iLovePDF is one of the best online tools for quickly removing PDF passwords. It is very easy to use and gives quick results.

Enter the file password and hit “Send.”

After just a few seconds, the PDF password will be unlocked. You can download and save this PDF file for further use.

There is other online software with PDF removal capabilities, such as:

Frequently Asked Questions How do I find my PDF password?

If you forgot your PDF password, the only way you can view it is by running the PDF file through a password-unlocking tool such as Smallpdf.

How to remove encryption from a PDF without a password?

To remove encryption from a PDF without a password, you need a PDF editor, such as Adobe Acrobat Pro, that has an unlock tool or a “Remove Security” feature. This method won’t work if the document permissions don’t allow editing.

How do I remove a password from a PDF file on Mac?

On a Mac device, you can remove PDF passwords using the “Preview” option. The trick is to open the password-protected file and save it as a new PDF file, which will then have the password removed.

Image credit: Pexels. All screenshots by Sayak Boral.

Sayak Boral

Sayak Boral is a technology writer with over eleven years of experience working in different industries including semiconductors, IoT, enterprise IT, telecommunications OSS/BSS, and network security. He has been writing for MakeTechEasier on a wide range of technical topics including Windows, Android, Internet, Hardware Guides, Browsers, Software Tools, and Product Reviews.

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Remove Leading Zeros From A Number Given As A String Using Python

In this article, we will learn a python program to remove leading zeros from a number given as a string.

Assume we have taken a number in string format. We will now remove all the leading zeros(zeros present at the beginning of a number) using the below-given methods.

Methods Used

The following are the various methods used to accomplish this task −

Using For Loop and remove() function

Using Regex

Using int() Function

Method 1: Using For Loop and remove() function Algorithm (Steps)

Following are the Algorithms/steps to be followed to perform the desired task. −

Create a function deleteLeadingZeros() that removes the leading zeros from a number passed as a string to the function.

Use the for loop, to traverse through the length of the string using the len() function.

len() function − The number of items in an object is returned by the len() method. The len() function returns the number of characters in a string when the object is a string.

Use the if conditional statement along with != operator to check whether the current character in a string is not 0

Get the remaining characters of the string after the leading zeros using slicing.

Return the resultant string after removing all the leading 0s from the input string.

Return 0 if there are no leading 0s found.

Create a variable to store the input number passed as a string.

Call the above-defined deleteLeadingZeros() function by passing the input string to it to get the resultant string after removing leading zeros.

In the same way check for the other string having no leading zeros.

Example

The following program returns as a string that removes all the leading zeros from a number passed as a string using for Loop and remove() function −

# creating a function that removes the leading zeros # from a number passed as a string to the function def deleteLeadingZeros(inputString): # traversing through the length of the string for k in range(len(inputString)): # checking whether the current character of a string is not 0 if inputString[k] != '0': # getting the remaining string using slicing outputString= inputString[k::] # returning resultant string after removing leading 0s return outputString # returning 0 if there are no leading 0s found in the entire string return "0" # input number as a string inputString = "0002056" print("Given String is:", inputString) # calling the deleteLeadingZeros() function by passing the input string to it print("After Removing Leading Zeros:", deleteLeadingZeros(inputString)) # checking it for other strings having no leading 0s inputString = "256" print("Given String is:", inputString) # calling the deleteLeadingZeros() function by passing the input string to it print("After Removing Leading Zeros:", deleteLeadingZeros(inputString)) Output

On execution, the above program will generate the following output −

Given String is: 0002056 After Removing Leading Zeros: 2056 Given String is: 256 After Removing Leading Zeros: 256 Method 2: Using Regex Algorithm (Steps)

Following are the Algorithms/steps to be followed to perform the desired task. −

Use the import keyword to import the regex(re) module.

Create a function deleteLeadingZeros() that removes the leading zeros from a number passed as a string to the function.

Create a variable to store the regex pattern for removing leading zeros from an input string.

Replace the matched regex pattern with an empty string using the sub() function.

sub() function(returns a string in which all the matching occurrences of the given pattern are replaced by the replace string).

Print the resultant string after removing all the leading 0s from the input string.

Example

The following program returns as a string that removes all the leading zeros from a number passed as a string using regular expressions −

# importing re module import re # creating a function that removes the leading zeros # from a number passed as a string to the function def deleteLeadingZeros(inputString): # regex pattern for removing leading zeros from an input string regexPattern = "^0+(?!$)" # Replace the matched regex pattern with an empty string outputString = re.sub(regexPattern, "", inputString) # returning output string after removing leading 0s return outputString # input number as a string inputString = "0002056" print("Given String is:", inputString) # calling the deleteLeadingZeros() function by passing the input string to it print("After Removing Leading Zeros:", deleteLeadingZeros(inputString)) Output

On execution, the above program will generate the following output −

Given String is: 0002056 After Removing Leading Zeros: 2056 Method 3: Using int() Function Algorithm (Steps)

Following are the Algorithms/steps to be followed to perform the desired task. −

Create a function deleteLeadingZeros() that removes the leading zeros from a number passed as a string to the function.

Use the int() function(returns an integer from a given object) to convert the input string to an integer. This function removes all the leading zeros.

Return the resultant number after removing all the leading 0s from the input string.

Example

The following program returns as a number that removes all the leading zeros from a number passed as a string using the int() function −

# creating a function that removes the leading zeros # from a number passed as a string to the function def deleteLeadingZeros(inputString): # converting the input string to an integer removes all the leading zeros result = int(inputString) # returning the resultant number after removing leading zeros return result # input number as a string inputString = "0002056" print("Given String is:", inputString) # calling the deleteLeadingZeros() function by passing the input string to it print("After Removing Leading Zeros:", deleteLeadingZeros(inputString)) Output

On execution, the above program will generate the following output −

Given String is: 0002056 After Removing Leading Zeros: 2056 Conclusion

In this article, we learned how to remove leading zeros from a number given as a string using three different methods. We learned how to use slicing to get a subset of an iterable, such as a string, list, or tuple. We also learned how to utilize the regex module to replace (substitute) one pattern with another.

How To Remove Yourself From A Facebook Group

Have you ever been automatically added to a Facebook group unknowingly or without permission? Unfortunately, it happens to all of us thanks to a ridiculous feature on Facebook. You know, the one that lets your friends add you to any group that they own or are a member of.

Even though you can’t stop people from adding you to groups, you can remove yourself from the group. You’ll know that you were added to a group because you’ll get a notification that “so and so” added you. Also you’ll probably start to receive notifications of new posts in the group.

So here’s what you can do to remove yourself.

3. A confirmation message will appear, asking you if you’re sure that you want to leave the group. You can also choose to prevent other members from adding you back to the group.

That’s it. You’ll no longer be a member of that group and you won’t be re-added. Now you can breath a big sigh of relief!

Charnita Fance

Charnita has been a Freelance Writer & Professional Blogger since 2008. As an early adopter she loves trying out new apps and services. As a Windows, Mac, Linux and iOS user, she has a great love for bleeding edge technology. You can connect with her on Facebook, Twitter, Google+, and LinkedIn.

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