First of all, the python code is perfectly working in PyCharm and in command prompt. So, Cv2 module is installed well on my Windows machine.
But when I run by IronPython Script engine, it failed as below.
IronPython.Runtime.Exceptions.ImportException: No module named cv2
I setup IronPython engine as below. Note that site-packages has cv2.pyd file.
var engine = Python.CreateEngine();
List<string> pathes = engine.GetSearchPaths().ToList();
pathes.AddRange(new[]
{
#"C:\Python27\Lib\", #"C:\Python27\Lib\site-packages\"
});
engine.SetSearchPaths(pathes);
dynamic py = engine.ExecuteFile("sample.py"); // <- Exception occurred here.
I guess engine.Setup.FileExtensions has only .py file, so that cv2.pyd is not recognized. But, I hardly figure out how to add .pyd to the setup.
Or, is there anything that I missed?
I think you did nothing wrong, but *.pyd files are just not working for IronPython by default. Just checkout IronClad or this so article: https://stackoverflow.com/a/1231131/2630261
Related
Using VS 2019 I installed the nuget packages IronPython v2.7.11 and DynamicLanguageRuntime v1.3.0 and am trying to run a python script. It ran fine until I added imports to the script:
import requests, time, socket
import random
Here’s the C#:
static void Main(string[] args)
{
DateTime start = DateTime.Now;
ScriptEngine engine = Python.CreateEngine();
var searchPaths = engine.GetSearchPaths();
// Path to where everything is installed for this Python enviroment
searchPaths.Add(#"C:\Users\George\.conda\envs\spenv2");
int url_id = 1701;
string url = "https://www.yellowpages.com/search?search_terms=Health&geo_location_terms=Aliso+Viejo%2C+CA";
ScriptScope scope = engine.CreateScope();
engine.ExecuteFile(#"D:\Apps\Data Destinations\Scraping\ScrapeProjects\Job1.v4_For_IronPython_CSharp\ScrapeUrlPages.py", scope);
dynamic testFunction = scope.GetVariable("scrape_all_pages_for_this_search");
dynamic result = testFunction(url_id, url);
Console.WriteLine(result);
}
I found a few posts regarding similar issues and the solution most of them was to add search paths. Which I did:
searchPaths.Add(#"C:\Users\George\.conda\envs\spenv2");
This is where everything is installed for the Python environment, spendv2, is being used.
Any recommendations on what I need to do?
Thank you.
The problem is an incompatibility between IronPython and Python and the more I dug into this the more problems I found.
Not documented anywhere but I found someone from the IronPython crew who pointed out that IronPython 2.7.11 "Must" interact with Python 2.7. Hmmm. 2.7 hit end-of-life a long time ago and you can't even download it from the Python site.
Not documented anywhere that I could find but IronPython 3.4 (just released) "Must" interact with Python 3.4, and yes, 3.4 hit end-of-life a long time ago and you can't even download it from the Python site. I find this odd that a new release of something would be based on something obsolete.
I was able to get Python 2.7.n from nuget and after getting everything setup and configured, and set all the new paths, I was able to get c# to execute a python script via ironpython. The script had the “import requests” and it did run – where as before when attempting to execute the script I would get the error:
IronPython.Runtime.Exceptions.ImportException - No module named requests
The script runs now – yippy - but – the python script gets an exception when calling the requests.get() method. The exception is:
"not expecting type '<type 'bytes'>'" object {string}
Evidently, from my searches, "not expecting type '<type 'bytes'>'" is a result of an incompatibility with the requests module and IronPython. There are about 5 well known python modules that are not compatible with IronPython so when it get called it returns a blob of bytes.
In conclusion, to the best of my knowledge you cannot call python requests from c#
I hope this helps someone as it cost me several long painful days.
What I see is you're using the get for the searchpaths so you load the collection of strings but what is missing is the engine.SetSearchPaths(searchPaths); to get it working.
I know that this is an old post, but I found something that works for me that can help in future questions about this.
I installed IronPython.StdLib from the NuGet Package.
I downloaded the needed library (Tkinter) with my IDE (PyCharm) and then I added the folder to the Lib folder in my C# project.
I added
var libs = new[] {#"{PATH OF YOUR PROJECT}\Lib"};
engine.SetSearchPaths(libs);
And that works for me.
I am attempting to run a simple python script within my .net application using IronPython. I have installed the nuget package into the project (I have NOT installed the ironpython cli on my machine) and have authored this code to handle setting paths, reading output, and setting input.
this.engine = Python.CreateEngine();
this.scope = this.engine.CreateScope();
this.streamOut = new MemoryStream();
this.streamErr = new MemoryStream();
this.engine.Runtime.IO.SetOutput(this.streamOut, Encoding.Default);
this.engine.Runtime.IO.SetErrorOutput(this.streamErr, Encoding.Default);
// this is a locally set environment variable
string pythonRootPath = Environment.GetEnvironmentVariable("PythonPath");
ICollection<string> searchPaths = engine.GetSearchPaths();
searchPaths.Add($#"{pythonRootPath}\Lib\site-packages\");
searchPaths.Add($#"{pythonRootPath}\Lib");
engine.SetSearchPaths(searchPaths);
this.engine.Execute(#"import jinja2");
Executing the script results in the following exception
IronPython.Runtime.Exceptions.ImportException: 'No module named errno'
My C# project has references to the following relevant (to IronPython) assemblies:
IronPython (v2.7.9)
IronPython.Modules
IronPython.SQLite
IronPython.Wpf
Microsoft.Dynamic
Microsoft.Scripting
Microsoft.Scripting.Metadata
My paths appear to be well enough set for my purposes as it's not the import of jinja2 itself that causes the error and I am able to import some standard library modules. However, I've seen that the os package fails to import for the same reason as jinja2. I also cannot import errno directly as expected, but I can import it directly if I run it via the python 2.7 cli so the package is installed.
I'm very much out of ideas here if anyone has any suggestions.
I am trying to use numpy module functions in my Python code that i run inside my c# application in VS13.
I'm doing this to import the module:
ScriptEngine pyEngine = IronPython.Hosting.Python.CreateEngine();
ScriptScope pyScope = pyEngine.CreateScope();
pyEngine.Execute("import numpy", pyScope);
however it says "No module named numpy".
I was looking for the solution and found this:
How to install numpy and scipy for Ironpython27? Old method doens't work
Using Nilsters answer I managed to install numpy and im able to use it when i run ipy from cmd. However i dont know how to use it in my c# app in VS.
I've been looking through the files and found
\IronPython 2.7\DLLs\NumpyDotNet.dll
and also:
\IronPython 2.7\Lib\site-packages\numpy\
How do i make it possible for my python code to import numpy?
I have written the following code and I am getting no module named fcntl when i am running the python script using C#
print "hi how are you"
import nltk
a="hi how are you"
tokens=nltk.word_tokenize(a)
print tokens
Possibly NLTK depends on subprocess module, which is not supported in embedded IronPython. There're already some answers on the subject:
"No module named fcntl" when py script run from c# but works from windows command line
No module named fcntl
sys.path
Also check your sys.path. Probably it is not set automatically for embedded engine. You can set library paths like this:
engine.SetSearchPaths(
new string[]
{
"C:\\Program Files\\IronPython 2.7",
"C:\\Program Files\\IronPython 2.7\\Lib",
"C:\\Program Files\\IronPython 2.7\\Lib\\site-packages",
}
);
sys.platform
Any module, dependent on fcntl, decides to import it only if sys.platform == 'posix'. Debug it's actual value inside your python code and try to force it to "win32" (before any other imports)
import sys
sys.platform = "win32"
I am trying to import scikit-learn in a C# (console) application. I am using Python Tools for Visual Studio and IronPython 2.7.3.
I managed to run an external python script and I also managed to import numpy by declaring the python path: "C:\Python27\Lib\site-packages\"
However, when it comes to scikit-learn I get an error message:
Oops! We couldn't execute the script because of an exception: No module named _c
heck_build
___________________________________________________________________________
Contents of C:\Python27\Lib\site-packages\sklearn\__check_build:
setup.py setup.pyc setup.pyo
_check_build.pyd __init__.py __init__.pyc
__init__.pyo
___________________________________________________________________________
It seems that scikit-learn has not been built correctly.
If you have installed scikit-learn from source, please do not forget
to build the package before using it: run `python setup.py install` or
`make` in the source directory.
If you have used an installer, please check that it is suited for your
Python version, your operating system and your platform.
The file "_check_build.pyd" exists in "C:\Python27\Lib\site-packages\sklearn__check_build\".
My code is based on this article: http://devleader.ca/2013/09/23/visual-studio-c-python-sweet/
The file I am using has only the following code:
from sklearn.svm import SVC
print('Hello Python in C#')
Is it possible to add and use scikit in C#? If yes, could you please provide a workaround?
Looks like scikit-learn requires a C extension, which means it won't run under IronPython.