How to backspace in python

For example would become 32, i have tried a lot of things but i can't seem to get it to work, i would be very grateful if someone could get it working, thank you. Here is the code:. Hi friend, If you want to clears the last number on the display then you have to backspace then you must need remove last character in the array and function look like this shown in below. Firefox and Microsoft Internet Explorer are recommended browsers for websites using java applets.

Ask Tech Query Post Blogs. Nerd Digest Users Other Sites. Most Viewed Most Recent 4. Your account has been flagged due to frequent spamming, you are not permitted to post comments. Contact admin findnerd. Negative Vote. Save Favourite. Tags Python GUI. Answer it. Unable to start Java!! Nerd figure out why We have detected you are using Google Chrome and might be unable to use the Java plugin from this browser.

Starting with Version 42 released AprilChrome has disabled the standard way in which browsers support plugins. More info. Nerd figure out why.

Unfortunately some of our below listed tools require Java plugin: Desktop recorder. Error Screen capture. Time Tracker. You have exceeded the maximum number of characters allowed for a comment without sign in. Either enter Content Or Record. Done Close. Insert an Image. Positive Votes. Negative Votes. Delete Comment. Are you sure, you want to delete this comment? OK Cancel. All rights reserved. Sign In. User Name Please enter user name. Password Password should have minimum 6 characters Please enter password.

Remember Me. Forgot Password?This demonstrates how to press keys with Python. Using pynput we are able to simulate key presses into any window. This will show you how to press and release a key, type special keys and type a sentence.

how to backspace in python

If you haven't used or setup pip before, go to my tutorial at how-to-setup-pythons-pip to setup pip. We will be using the pynput module to listen to mouse events.

To install this module execute pip install pynput in cmd. Watch the output to make sure no errors have occurred; it will tell you when the module has been successfully installed. To double check that it was installed successfully, open up IDLE and execute the command import pynput ; no errors should occur. Create a new script and save it somewhere so you can easily run the script. Import Key and Controller from pynput. Make a variable called keyboard and set it to an instance of Controller.

Now using the keyboard variable we can press and release keys. Using keyboard. This allows us to type a key by pressing and releasing. You can only supply this method with one key at a time. Here is an example of how to type the letter 'a'. For special keys that can't be put into a string like shift or control, you will need to refer to the page here to look at the Key class for supported keys. For example, if I wanted to press the windows key, I would look at that page for the key.

On PC platforms, this corresponds to the Super key or Windows key, and on Mac it corresponds to the Command key" which is what I am looking for. Now for the code. To do this we will need to press ctrl, press and release c and then release ctrl.Inevitably, when we get to talking about working with files in Python, someone will want to open a file using the complete path to the file.

In other words, they write:. Remember that strings in Python normally contain characters. In those cases, Python like many programming languages includes special codes that will insert the special character. For example:. But what other characters require it? It turns out, more than many people might expect :.

I mean, when was the last time you needed to use a form feed character? Or a vertical tab?

how to backspace in python

I know — it was roughly the same day that you drove your dinosaur to work, after digging a well in your backyard for drinking water. But nearly every time I teach Python — which is, every day — someone in my class bumps up against one of these characters by mistake. So, what can we do about this? Double the backslashes, of course.

Probably not. So my general rule, and what I tell my students, is that they should always double the backslashes in their Windows paths. In other words:. But wait: No one wants to really wade through their pathnames, doubling every backslash, do they? Of course not.

Python 3 Escape Sequences

I think of raw strings in two different ways:. Either way, the effect is the same: All of the backslashes are doubled, so all of these pesky and weird special characters go away. Enjoyed this article? For a more detailed explanation read this post. Use forward slashes and avoid drive letters if you want your paths to work under multiple operating systems.

This can work splendidly for relative paths, or well-defined fragments of paths. Use raw strings if you have to copy and paste paths between Python and other Windows programs e. But for people who only work on Windows, and who are relatively new to cross-platform issues, forward slashes seem super-weird and non-intuitive to them.

how to backspace in python

This is true, but if people are just trying to hard-code a path in their program and then open a file, that seems like overkill…. Or even better than that, using pathlib, which solves even more problems. Please log in again. The login page will open in a new tab.

After logging in you can close it and return to this page. This seems like pretty standard Python, no? Remember that path I mentioned at the top of the blog post, which seems so innocent? I think of raw strings in two different ways: what-you-see-is-what-you-get strings automatically doubled backslashes in strings Either way, the effect is the same: All of the backslashes are doubled, so all of these pesky and weird special characters go away.

Related Posts. Robert says:.

how to backspace in python

Python Code Snippets 1 — Python Coder says:. Phil says:.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Vi and Vim Stack Exchange is a question and answer site for people using the vi and Vim families of text editors. It only takes a minute to sign up. Trying to delete characters in insert mode with the backspace key sometimes doesn't seem to work. I can backspace sometimesbut at other times it does nothing; the cursor doesn't go to the left, and absolutely nothing seems to happen.

I noticed this using gVim in Windows. The backspace seems to work as expected while using Vim from the terminal in most Linux systems however.

But if we would then add a command and the fiand go back up, we are allowed to remove the indentation:. This is because in the first example, Vim determined it should add 1 level of indentation when you pressed Enter; but in the second example, Vim didn't autoindent anything, it's just Tab characters or a few spaces.

Also see :help 'autoindent'. I noticed this using GVIM in windows. The backspace seems to work as expected while using VIM from the terminal in most Linux systems however. The reason for this is because many Linux distro's ship with pre-made vimrc files which set some common options. If you install Vim on Windows, the default is to use the default vimrc and gvimrc that Vim ships with.

The Vim default is an empty value for backspace. This question is about Backspace in insert mode, but let me also add some brief remarks about Backspace in normal mode.

By default, the backspace will go to the previous line if at the start of a line as if eol was in backspace ; you can control this behaviour with the 'whichwrap' option through the b flag enabled by default.

How to Get Mouse Clicks in Python

More information. All versions past 3. A discussion on reddit about this is here. Sign up to join this community. The best answers are voted up and rise to the top.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I am using Python 2. Surely there is some sort of shortcut, instead of having to backspace every individual line? You need to restart the shell after that.

Learn more. How do I unindent blocks of code in Python? Ask Question. Asked 4 years, 6 months ago. Active 4 months ago. Viewed 24k times. From the Python Shell, I opened a new file. What do you mean by the Python Shell? If I run python from the terminal I get a shell in which I can run individual commands but there is certainly no support for editing a file.

It's not meant for that. If you want to edit in the terminal use your preferred text editor such as vim. It's not clear what you mean by "in Python". If you mean IDLE, then by default Ctrl-[ dedents - if you go through the menus, they show the shortcuts. I choose to use this over something like PyCharm as a form of discipline.

I feel that if I use PyCharm I will get into the habit of relying too much on its built in features and autocompletes So you do mean IDLE? Then mention that in the question. Or just search for it And IDLE's hardly asceticism, it does have autocomplete! From there, I open a new file, and it's blank.By using this site, you agree to our updated Privacy Policy and our Terms of Use. Manage your Cookies Settings. Join Now login. Ask Question. Hello, I have one simple string, backspace character question.

Regards, Vedran. Jul 31 ' Post Reply. Share this Question. Lawrence Oluyede. On 31 srp,vedrandeko On 31 srp,ra I don't know how to write script with module tokenize for code indentation.

Diez B. Still not giving up reinventing the wheel? You should take some lessons on syntax analysis before attempting this. But I know this words won't be heard So, to your actual problem: that backspace is removing a character is something an editor or a terminal do, because they interpret the backspace.

So what you need to do is: search the string for backspaces, and remove the BS as well as the character before. John Machin. Now try it on IDLE.

This discussion thread is closed Start new discussion. Similar topics open source pong or equally simple game location of ". Backspace taking the day off string. Question stats viewed: replies: 6 date asked: Jul 31 '07 Follow this discussion. Follow us to get the Latest Bytes Updates. Regards, Vedran Jul 31 '07 Post Reply. Regards, Vedran Jul 31 'By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The code works fine when executed from the Windows command line, I tested it in Pycharm's console. All Python can do is write out the data to sys. Here, the console you are using will move the cursor onwards for separate write calls, it appears. The next print will start outputting data from that new position.

Your print code happens to work on most terminals or consoles, because most of those don't care about how many characters you output, only where the cursor currently has been positioned.

But that you have a console that behaves differently is not Python's fault. If you actually print in the python console then the flush argument first prints out the result and then finishes the function. In the case of multiple escape characters you should see the backspace or any other printed out.

The why it happens is not known to me since I am just starting in Python but after thorough research and experimentation i have found it to be true. I think this is the problem try and write here what output will had because now i can't test it. Write from phone.

Learn more. Asked 3 years, 11 months ago. Active 3 years, 3 months ago. Viewed 2k times. Mark Evans Mark Evans 1 1 gold badge 8 8 silver badges 26 26 bronze badges. Your update doesn't erase the character.

Active Oldest Votes. Petko Kamenov Petko Kamenov 1 1 gold badge 5 5 silver badges 9 9 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

String after processing backspace characters

Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow How many jobs can be done at home? Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Triage needs to be fixed urgently, and users need to be notified upon….

thoughts on “How to backspace in python”

Leave a Reply

Your email address will not be published. Required fields are marked *