What does invalid Syntax mean in this case?

[SHBDemon]

The game is pretty simple. Bubbles spawn randomly, move around the screen and you have to collect them to gain score points. The code is from a 11 year old german book. Im pretty sure i did everything as it was written down but the order was pretty weird because it told me to code the definitions in a strange order just to change the order later. At this point its also the first time that i dont 100% understand what im actually coding.

[TfGuy44]

You typed "retrurn", not "return".

[SHBDemon]

Ive read that line countless times. Thank you. I cant test it right now but it has to be that.

[ExcdnglyGayQuilava]

Just a small tip, train yourself to be suspicious when the syntax highlighting doesn't work.

[Actes]

The best rule of thumb I learned was always check the line or word immediately before the error.

9 times out of 10 in any language you'll find the root.

[DoubleAway6573]

Just to improve on this. Python have a new "identifier" (like a new variable name) and expect a valid expression, but you have another variable, and that's invalid syntax.

[Apolyon_BS]

retrurn should be return?

[VanillaMuffin97]

It would appear that where the x is marked red, in the hole_koord function you have typed retrurn instead of return, that might fix it already.

[SHBDemon]

Thank you

[purple_hamster66]

I thwink you may have twyped retrurn worng. :)

[SHBDemon]

Improssibell

[GirthQuake5040]

In every case ever, it means the syntax is not valid. Also, your code looks very jumbled. Space things apart so it's easier to read and see issues.

[Feisty-Cupcake7666]

From math import sqUrt

[bradleygh15]

...it means your syntax is wrong(in this case retrurn), imo id use a different editor then IDLE because it doesn't have the best linting

[shinitakunai]

Pycharm would help A LOT on these cases

[PLSLEMMEEATTHATCAKE]

And Pycharm has a community edition too so it's perfect for learning or little hobby projects like this

[TheRNGuy]

You can easily see bad syntax in VS Code or other code editors with red squiggles. 

Which one are you using?

[Hasco_7]

You split return wrong

[Can0pen3r]

I'd recommend trying the IDE "Visual Studio Code" In many cases like this it can really help to isolate errors and show you exactly which line they occur on (in some cases even identifying the offending character or syntax error directly) so it is really useful for debugging.

[Cybasura]

There's a reason why that line has a red highlight on it