Code Foundation for ROS exam

[levdan159]

Hey!
I’m just starting out on your platform, I’m very impressed so far!
I’ve revently finished the prerequisites exam, although the code seems to work as expected I get 1.5/10. I followed the instructions very closely I even checked a couple of times to see if I missed something.

Is there an exam log to see what I did wrong?
Sorry if its another RTFM issue.

[ralves]

Hi @levdan159,

I’ve been checking the correction logs, and it seems that your task1.sh file doesn’t have the execute permissions. This is normally solved with:

chmod +x task1.sh

There are other problems in the logs, but they are probably related to this first error that I mentioned.

[levdan159]

Hey @ralves !

Thanks a bunch!

Added execution premmisions to all the scripts, got 5.8/10 this time, seems I’m getting better!
Might be a problem with my code, but should work fine from what I see in my testing.
I’ll be continuing to ROS basics now, but would love to know what I’m doing wrong

[ralves]

Hi @levdan159 ,

according to the last logs, there seems to be a problem in the constructor of a class.

Traceback (most recent call last):
  File "task3_correct2.py", line 3, in <module>
    ec = ExamControl()
TypeError: __init__() takes exactly 2 arguments (1 given)

In addition to that, the squares are reported as not being correctly done.

The highest value of the laser also was not correctly read, it seems.

[levdan159]

So is it a problem with my code?

• Added proper Shebang heading for each file.
• Tweaked task3.py constructor class so it takes just one argument, just the class instance (self).
• Changed the squares so it catches invalid input.
• I noticed that I returned the max/min positions in task1.py in the wrong order, fixed.

Manged to lower my grade by 1 point !
The code still seems to work as expected.

Seems I also have a similar problem to :

Why doesn't my grading show explicitly which parts went wrong?

why is it that when i send my prerequisites exam for correcting, i get the screen as shown: [ya] However, after looking through the forums, i realise that other people get their grading for each task separately, making it easier to debug and rectify errors as such: [image] How do i get a detailed report like the latter image? Thanks

I don’t get a report of what parts are wrong.

[ralves]

Hi @levdan159,

there seems to be still problems with your constructors.

Traceback (most recent call last):
  File "task3_correct2.py", line 3, in <module>
    ec = ExamControl()
TypeError: __init__() takes exactly 2 arguments (1 given)

Also, when running task2.sh it gets:

./task2.sh medium_square
Enter a square to perform: No correct input was given! Try again.

The same happens with:

./task2.sh small_square
Enter a square to perform: No correct input was given! Try again.

I would highly recommend you to read carefully the quiz instructions again because it is an automated script that runs the correction, following what is said in the instructions.

[ralves]

Hi @levdan159,

we have been investigating why you were not receiving any feedback on which tasks of the quiz failed, and we found it was a problem in our system.

It is now fixed. If you submit the quiz again, now you should receive feedback while the auto-correction system is running.

Please let us know if you find any other problems, and thanks for reporting the problem.

Cheers,