Stop Execution of Databricks notebook after specific cell - azure-databricks

I Tried sys.exit(0)(Python code) and dbutils.notebook.exit() on Databricks notebook. But both the option didn't work.
Please suggest any other way to stop the execution of code after a specific cell in Databricks notebook.

dbutils.notebook.exit() does not work because you need to put the string argument, it fails silently without it. To make it work you should write something like:
dbutils.notebook.exit("whatever reason to make it stop")

Just use this. And click on run all cell button on Databricks notebook. If the condition is satisfied then execution will be stopped. Worked for me.
if (df.shape[0]==0): dbutils.notebook.exit('stop')

Related

ln[*] in Jupyter notebooks when using the %%bash magic

I'm working in Jupyter notebooks, when I use the %%bash magic I get the ln[*] (which means the kernel is busy) instead of the ln[number]. The kernel seems to stay busy until I restart it, and it always does this when using %%bash.
It was working fine until last week, when we were moved to Windows 10 pro with a new AVG antivirus - could this be it?
Any help would be great!
A possible cause is you use the %%bash magic command and not quit with "quit" command,for example the execution result will ask you to keyboard a "ipdb" message when you use "%debug" command ,if you skip this step and execute other cells ,you will get the "[*]" signal and it means those cells will not execute unless you restart the kernel,hope helpful.

My OpenShift custom auto scaler haproxy_ctld only logs "no such file or directory"

On an openshift PHP5.4 cartridge with embedded haproxy, I followed the tuturial for putting a custom auto scaling algorithm in place. After I push my (executable) haproxy_ctld.rb code, it tells me to have restarted the haproxy_ctld successfully, however when I go via ssh to the shell of my app and type a command to the deamon it gives one or many (depending on the flags) times the message ": No such file or directory". When I look in the log file of haproxy_ctld it also only contains some entries of ": No such file or directory".
I did not change anything about the code. Only thing changes is that the file from over here is added as executable to the .openshift/action_hooks directory.
I also tried adding an info-logging statement as the first statement of each method in the file, to get a grip on what is happening. I would expect such log messages to appear in the log file e.g. after typing "haproxy_ctld -u" it should give me one of my added info-log messages, but no.
When removing the haproxy_ctld.rb file, typing haproxy_ctld --help gives me the help text like it should.
I ran out of ideas. Who has ANY idea what to do next, please help me? Thanks!
Turns out after creating a new app and following the tutorial all is well. Maybe the first time I skipped / overlooked the step of restarting the entire app as mentioned in the tutorial.

How do I programmatically stop all synths?

How do I programmatically tell supercollider to stop all synths, as in the equivalent of Ctrl+. in the IDE?
I don't have SC booted at the moment, but s.freeAll should do the job, as it frees all nodes attached to the server.
http://doc.sccode.org/Classes/Server.html#freeAll
You can all Ctrl+. from code directly:
CmdPeriod.run
This is more complete than s.freeAll as it also stops language-side Threads, including the one that contains this command. To see how to have threads escape CmdPeriod, check out the helpfiles for CmdPeriod and for SkipJack

Invoke debugger programmatically?

Is there a way to invoke the script debugger programmatically?
I want to create a dialog box that offers an option to start the debugger (as if it had reached a breakpoint in one of the callers), similar to the one that QTP offers when it encounters a playback error.
This is for QTP, but i estimate that if one can do this for VBS, it'll work there too.
Updated update
The stop statement does what I want -- except for this (in conjunction with QTP/UFT):
it stops where the stop statement is (and not in the caller's code) (I think I could work around that by putting the function with the stop statement into a file that I load in a way that it won't be jumped into by the debugger (LoadLibrary? ExecuteFile?));
it requires me to have triggered one "real" breakpoint during the run session previously, and continued execution with "Run"/F5.
Does Err.Raise work for what you're trying to achieve?

prolog running not work properly

sometimes when I run my program it works properly and sometimes when I try to run it
it can't start to run
ERROR: Undefined procedure:
I restarted
I consulted
then I tried and I got answers
what is the problem here? what should i do?
I have SWI-Prolog Editor
You must re-consult the file after adding any rule. Otherwise prolog will not get the rule definition and show ERROR: Undefined procedure. You can also do it by using the menu option Reload modified files.
If you are using SWI-Prolog Editor you have to press F9 to reconsult the file you are currently editing.
Ctrl C+Ctrl B does for me: it prompts to save any edited file and run make/0. It's a combination I use so often, has become almost a 'tic' for me...

Resources