cast_set deprecated. What’s the replacement? - open-policy-agent

I’m currently running OPA version 0.39.0, but I’m trying to upgrade to a more recent version and am getting the following issue:
rego_type_error: deprecated built-in function calls in expression: cast_set
I tried looking through the docs and release notes but don’t see anything about cast_set being deprecated. Is there a work around to continue using a deprecated function or is there a suggested replacement?
Also, is OPA following SemVer, with Major.Minor.Patch? Would expect subsequent versions after 0.39.0 to still be compatible with it since we are currently on 0.46.1.

You did not state which command you are running when you see that error. The only one that should produce that is opa check --strict, where the very purpose of the command is to check for things like unused variables, use of deprecated functions, etc... i.e. strict mode.
I just tried some other commands, like opa build and opa run, and none of them seem to produce that warning - and they shouldn't.
The idiomatic way of creating a set from an array, is to use a set comprehension:
my_arr := [1, 2, 3]
my_set := {x | x := my_arr[_]}
my_set == {1, 2, 3}
We try hard to not make backwards compatibile changes in OPA, and if you're seeing this error outside of strict mode, please open an issue. A command like opa check --strict is however meant to warn about things like this, so that's going to be an obvious exception.

Related

Ada + Machine Learning (Python Framework)

I'm trying to write a simple machine learning application in Ada, and also trying to find a good framework to use. My knowledge of one thing is extremely minimal, and of the other is somewhat minimal.
There are several nifty machine learning frameworks out there, and I'd like to leverage one for use with an Ada program, but I guess I'm just...at a loss. Can I use an existing framework written in Python, for instance and wrap (or I guess, bind?) the API calls in Ada? Should I just pass off the scripting capabilities? I'm trying to figure it out.
Case in point: Scikit (sklearn)
https://scikit-learn.org/stable/tutorial/text_analytics/working_with_text_data.html#
This does some neat stuff, and I'd like to be able to leverage this, but with an Ada program. Does anyone have advice from a similar experience?
I am just researching, so I have tried finding information.
http://www.inspirel.com/articles/Ada_Python_Binding.html
https://scikit-learn.org/stable/tutorial/text_analytics/working_with_text_data.html#
The inspirel solution is based on python2.7. If you're using anything from python3.5 onwards a few mods need to be made. On Linux, changing to say python 3.7, you'd just change
--for Default_Switches ("Ada") use ("-lpython2.7");
for Default_Switches ("Ada") use ("-lpython3.7");
but on windows, the libraries aren't dumped in a community lib so gnat doesn't know where to find them. All the packages are kept separately. The -L has to be added to tell the linker where to find the library. Alternatively, you can use for lib_dir. In my case, I did a non-admin install of python, so it looks something like
for Default_Switches ("Ada") use ("-L\Users\StdUser\AppData\Local\Programs\Python\Python37-32\libs", "-lpython37");
Note that on windows, the library is called python37: not python3.7. Use gprbuild instead of gnatmake -p, which has been deprecated. If you do all your mods correctly
gprbuild ada_main.gpr
should give you an executable in obj\ada_main.exe if it builds. If a later version of python is used, some edits need to be made
python_module.py
#print 'Hello from Python module'
print('Hello from Python module')
#print 'Python adding:', a, '+', b
print('Python adding:', a, '+', b)
ada_main.adb
-- Python.Execute_String("print 'Hello from Python!'");
Python.Execute_String("print('Hello from Python!')");
Some routines have been deprecated so the linkage has to change
python.adb
--pragma Import(C, PyInt_AsLong, "PyInt_AsLong");
pragma Import(C, PyInt_AsLong, "PyLong_AsLong");
--pragma Import(C, PyString_FromString, PyString_FromString");
pragma Import(C, PyString_FromString, "PyUnicode_FromString");
Running the build and executable should give
C:\Users\StdUser\My Documents\ada-python>gprbuild ada_main.gpr
Compile
[Ada] ada_main.adb
Bind
[gprbind] ada_main.bexch
[Ada] ada_main.ali
Link
[link] ada_main.adb
C:\Users\StdUser\My Documents\ada-python>obj\ada_main.exe
executing Python directly from Ada:
Hello from Python!
loading external Python module and calling functions from that module:
Hello from Python module!
asking Python to add two integers:
Python adding: 10 + 2
Ada got result from Python: 12
we can try other operations, too:
subtract: 8
multiply: 20
divide : 5
Remember to put the pythonxx.dll somewhere on your path otherwise it won't be able to find the library when it starts executing.

Puppet3 | read values from different yaml file

So I'm using puppet3 and I have X.yaml and Y.yaml. X.yaml has profiles::resolv_conf::nameservers: [ '1.1.1.1', '8.8.8.8', '2.2.2.2' ]in it. I want to add that [ '1.1.1.1', '8.8.8.8', '2.2.2.2' ] as a value to the servers: which is in Y.yaml:
'dns_test':
plugin_type: 'dns_query'
options:
'servers': \['1.1.1.1', '8.8.8.8', "2.2.2.2"\]
'domains': \['google.com'\]
'record_type': 'A'
'timeout': 5
tags:
'input_source': 'dns_query'
By doing this I want to make sure that when someone change values in profiles::resolv_conf::nameservers: that value is changed in this telegraf plugin too.
I tried multiple solution but the one that was the closest was:
'dns_test':
plugin_type: 'dns_query'
options:
'servers': "%{hiera('profiles::resolv_conf::nameservers')}"
'domains': ['google.com']
'record_type': 'A'
'timeout': 5
tags: 'input_source': 'dns_query'
but problem is that puppet was adding extra " " to the value and final value in plugin conf was:
"["1.1.1.1", "2.2.2.2", "8.8.8.8"]" instead of ["1.1.1.1", "2.2.2.2", "8.8.8.8"]
TL;DR: You can't.
From the current docs and the Puppet documentation archive, I confirm that no version of the %{hiera} interpolation function or its replacement, %{lookup}, ever supported interpolating values other than strings. That's expressed in the current docs like so:
The lookup and hiera interpolation functions look up a key and return
the resulting value. The result of the lookup must be a string; any
other result causes an error.
(Emphasis added)
What you're looking for would be supported by Hiera 5's %{alias} function, provided that the data are available somewhere else in the same hierarchy (which is also a requirement for %{hiera}). Since you're stuck on Puppet 3, however, you're probably on Hiera 2, and certainly not later than Hiera 3.
"But wait!" You may say. "I'm getting a successful interpolation, but the data are just munged". Specifically, you wrote:
problem is that puppet was adding extra " " to the value and final value
Since %{hiera()} interpolates only strings, it is not surprising that you got a string value, given that you got a value at all. I do find it a bit surprising that Puppet did not throw an error, but I'm not prepared to comment further on that without a minimum reproducible example that demonstrates the behavior.

catalogue.RegistryError: [E893] Could not find function 'spacy.copy_from_base_model.v1' in function registry 'callbacks'

I'm a Spacy's new user and I'm trying to run this ner_demo_update project and I got this error :
catalogue.RegistryError: [E893] Could not find function 'spacy.copy_from_base_model.v1' in function registry 'callbacks'. If you're using a custom function, make sure the code is available. If the function is provided by a third-party package, e.g. spacy-transformers, make sure the package is installed in your environment.
I'll like to know if someone has face the same issue.
copy_from_base_model.v1 is a new function, introduced in spaCy v3.0.6. Are you perhaps running an older version of spaCy? If so, can you try updating it? This will likely resolve your error.
See also: https://github.com/explosion/spaCy/discussions/7985

Running F# xUnit Fact from TestDriven.NET reporting "It looks like you're trying to execute an xUnit.net unit test."

I am trying to run xUnit tests (from an F# module, if it makes any difference) using TestDriven.NET, but whatever I do I get this error:
It looks like you're trying to execute an xUnit.net unit test.
For xUnit 1.5 or above (recommended):
Please ensure that the directory containing your 'xunit.dll' reference also contains xUnit's
test runner files ('xunit.dll.tdnet', 'xunit.runner.tdnet.dll' etc.)
For earlier versions:
You need to install support for TestDriven.Net using xUnit's 'xunit.installer.exe' application.
You can find xUnit.net downloads and support here:
http://www.codeplex.com/xunit
I tried following the suggestions, i.e. I copied the files
xunit.dll.tdnet
xunit.extensions.dll
xunit.gui.clr4.exe
xunit.runner.tdnet.dll
xunit.runner.utility.dll
xunit.runner.utility.xml
xunit.xml
to the folder with xunit.dll and I ran xunit.installer.exe. How can I get it to work?
I just figured out that I forgot to make the test a function in F# (so it was just a value). The error message can't be more misleading though!
You have two problems:
your Fact is broken:-
If you hover over the
please work
bit, you'll see something like: unit -> int
For a Fact to be picked up by an xUnit runner, it needs to yield `unit (void).
Hence, one key thing to get right first is to not return anything. In other words, replace your 123 with () (or an Assertion).
You can guard against this by putting a :unit stipulation on the test:-
[<Fact>]
let ``please work`` () : unit = 123
This will force a compilation error.
TestDriven.NET is reporting it cannot find the xunit.tdnet modules
It's critical to get step 1 right first. Then retry and the problem should be gone
If it remains...
Either try the VS-based runner which should work as long as it's installed and xunit.dll is getting to your output dir or look at the docs for your version of TD.NET for detailed troubleshooting notes (exec summary is if the .tdnet file was in your out dir or you undo and redo the xunit.installer from the folder containing the packages it should just work, esp if you are on latest)

Erlang: Problem with crypo:sha()

This works in my erlang shell:
1> U = default_user_name().
2> crypto:start().
3> crypto:sha(U).
4> crypto:stop().
But when I compile this:
default_pw() ->
U = default_user_name(),
crypto:start(),
crypto:sha(U),
crypto:stop().
And execute it in the erlang shell, I get this:
1> person:default_pw().
** exception error: bad argument
in function port_control/3
called as port_control(crypto_drv04,5,<<"jDoe">>)
in call from crypto:control/2
Two questions:
1) What am I doing wrong?
2) It seems that I need to start and stop the crypto server. But is there a better place to start and stop it in my application?
Many thanks,
LRP
The error you are getting indicates that the crypto application was not started. An easy way to start it is just to add it as a parameter to erl like so:
$ erl -s crypto
I had a look at the current implementation of crypto and the past release notes for erlang and I came to the following conclusions (someone please correct me if I'm wrong):
Erlang releases <14A require crypto to be started prior to calling any functions because the library used a port driver. This makes sense because I got the error you described with 13B04 after not starting crypto.
Erlang releases >=14A don't require crypto to be started as the implementation now uses NIFs. This makes sense because the current implementation of crypto_server.erl is just a gen_server template, and on 14B03 I don't need to start the application in order to make crypto:sha/1 work.

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