My favorite Jupyter notebook shortcuts 

You are so welcome!

I'm delighted you enjoyed it!

I've gotten another request to talk about my typing speed -- so I'll make a video about that soon!

Glad it helped!

Glad you enjoyed it!

What icons do you want to retrieve?

In theory, you can use some combination of control and/or alt with copying to get multiple, non-consecutive cells. But I've have very mixed experience with it. Maybe there's a clear formula for making it work, and I simply haven't figure that out yet.

You can have as much (or as little) Python code as you want in each cell. So you can call the "input" function multiple times, thus getting several, distinct inputs from the user. Presumably, you would then want to assign those inputs to separate variables, which you could use later on.

Glad to hear it!

Delighted to hear it!

The shortcut keys are a bit different on each platform. What you can do is press "h" in command mode, and thus see the keys you need for different functionality on Windows. I'm not sure what you should be using, but there's almost certainly something!

@@ReuvenLerner will do thanks. Also I wanted to know I have a code of few lines and for time being I want to make all into comments (#) is there any shortcut?

On my computer (a Mac), shift+enter runs + creates a new cell, selecting it. But command+Enter runs without creating a new cell. Maybe your computer (or its keyboard) should be using a different modifier key?

You can try Alt + Enter

Jupyter runs in the browser. So you can use your standard browser mechanism for increasing text size. I use Firefox on a Mac, so I use command-plus and command-minus.

Glad it helped!

Oh, no! I'm sorry to hear that you're having these problems. It definitely takes time to get your environment working in a way that makes sense and is stable.

Jupyter can't help you there, I'm afraid -- try remapping your keyboard, or getting one with dedicated () keys.

Hmm... you have to be in command mode. Make sure to press ESC first. Otherwise... I dunno!

Great to hear!

Yes! Enter 'h' in command mode.

I sometimes press ESC then ENTER, just to see where my cursor is. Hope this helps, and glad you enjoyed the video!

@@ReuvenLerner I know where my cursor is but my question is how I will jump out of any symbols like " " or ("Hello") I don' t want to use my right arrow.

@@ramanverma3166 Ah, I'm not sure. You could try the Emacs-style keys, such as control-e to go to the end of the line. But I'm not sure on which systems those will work.

I'm glad you enjoyed!

Happy to hear you enjoyed it!

Type annotations are a great, important, and useful tool... but they aren't used much in Jupyter notebooks, so far as I know.

Glad it helped!

Glad it helped!

Thanks for the kind words!

Sure! You can enter as many (or as few) lines as you want in a cell, and then run them.

@@ReuvenLerner Thank you so much

Great to hear -- thanks for letting me know!

Delighted to know you enjoyed it!

"Blocks" in Python are parts of the code that are indented together, and which come after a colon. So after an "if" statement, you'll have a block. Or a "for" loop is defined in a block. However, your professor might be using the term "block" to refer to Jupyter's cells, into which you can type. I hope this helps!

cursor must be at the beginning of the line

You can comment/uncomment Python code with control-/ (slash). Just highlight the text you want to comment, and hit that key combination.

@@ReuvenLerner thank you so much

Glad to hear it!

Depends on how you deleted it... but if you don't have any backups and it's not in the trash bin on your computer, then I'm afraid that it's almost certainly gone.

Sorry, I don't know! Maybe you are somehow accidentally getting into edit mode, rather than command mode?

Note that for this you need to be in EDIT mode and not Command Mode. See the outline in the video. it is green.​

Thanks. I will pay attention for that

Excellent!

Happy to hear you liked it!

I'm not sure what to suggest; the tool bar should become visible when you choose the menu option to toggle it on and off.

First, you have to be in command mode. Either press ESC or click to the left of the cell. Once you've done that, you can use "x" to cut it.

Double D key

Hmm, it could be a few things. (1) Maybe the cell isn't a code cell any more, but is a Markdown/Raw cell? Check the cell type. If it's a code cell, you'll see "In []" on the left. (2) Maybe Jupyter is stuck? If you see "In [*]" on the left, use Kernel->interrupt to kick the kernel a bit.

You can use ESC (or click on the left side) to get into command mode. Press H to see all of the commands that are available in command mode.

I don't think that there is a Jupyter command to do that. You would have to do that in your OS (or via a ! command in Jupyter). In Unix, you could say "rm -r DIRNAME", but be warned! That's potentially quite dangerous. I usually prefer to move everything to /tmp, just in case with "mv -v * /tmp". Then, if I make a mistake, I can undo it.

@@ReuvenLerner I m using windows... I actually have another problem don t know why is that when I use PATH = os.path.join('MP_DATA'). I was able to create a new folder and now it doesn't work. I can't understand!?

@@imanefahim8557 This isn't a good place for me to explain os.path.join and other such things. (I'm hoping to create some videos on the "os" package anyway, so this gives me a good push!) But it's hard for me to know what you got wrong from your description - what error message you got, what you were entering, if it was in Jupyter vs. the command line, etc. There are lots of little things to notice and take care of. But it is possible, I promise!

@@ReuvenLerner yeah I understand, I solve it actually. Thanks 😊

@@ReuvenLerner Do you have a video explaining how to move your project from Jupyter notebook to local python?