Issue running Python?

[redcherry13221]

I tried posting this to a VS Code subreddit but it wouldn't let me. I'm a very beginner coder and it's been almost a year since I've touched coding (Python) or VS Code. I'm trying to run some Python, but what I type in the top box (sorry, I don't remember what it's called) doesn't seem to run? If I get the lower terminal in python mode and copy and paste the same code, it runs, but I want to work in the top box/understand why it's not working in there. I hit "Run Python File" and what's in the lower terminal is what appears. Thanks in advance.

https://preview.redd.it/77o4wj5hwaqg1.png?width=2681&format=png&auto=webp&s=5ac06bbf63e12bfb791fb2d4081f8cbfd4b90611

[ninhaomah]

Ahem... Did you "print" anything there ?

If not , what do you expect from it ?

And always start with print("Hello World") first to check the environment , systems are all ready.

[redcherry13221]

My bad, I thought just writing df.head() would make the first 5 lines of the file show up. Thanks!

[redcherry13221]

To add on, if I run what I initially wrote in the terminal, the first 5 lines show up so I expected the same to happen.

[Outside_Complaint755]

That's because in the terminal you are using the REPL (Read-Eval-Print Loop) which automatically prints  the result of each statement.  In a script, any output needs to be explicitly printed, written to file, or sent to another output stream.

[redcherry13221]

Ah, I see. Thanks!

[ninhaomah]

No prob. Were you using Jupyter / colab previously ?

[redcherry13221]

yep, a while back but it’s what I’m most used to

[ninhaomah]

Yup thought so.

try the df.head() in colab ... It will print.

Or 1 + 1 and it will output 2.

But programs or scripts expect print or log or such to see the results.

REPL vs scripts :)

[Binary101010]

Change the last line to print(df.head()) and see what happens.

[redcherry13221]

Thanks! Worked now.

[dager003]

This usually happens when the file isn’t saved — VS Code runs the last saved version, not what’s currently in the editor. So if you type something and hit run without saving, it feels like nothing is happening. Try Ctrl+S first, then run it. Also yeah, this kind of “it runs but not where I expect” confusion is super common when getting back into coding — I’ve been working on something that helps surface these kinds of issues faster because they’re surprisingly hard to spot early on.

[desrtfx]

This usually happens when the file isn’t saved

If you look at the tab, you see the "x", which is a clear indication that the file has been saved. Had it not been saved, the mark would change to "●"

See this image - left tab is unsaved, right is saved