Calling a python Command-line tool with arguments, with PythonKit using Swift-CodePudding

I have been experimenting a bit with PythonKit and have some simple examples working. However I would now like to call a python script that takes some command line arguments and I can’t seem to get it working - it mostly just crashes.

This is the code I am using in swift - I am trying to get the version number of the script:

let sys = Python.import("sys")
sys.path.append(“/Path/To/Script/Directory/“)
var example = Python.import(“my_script”)

example.main("-v")

If I call the script like so: example.main() - without any arguments at all, the script prints out its arguments:

optional arguments:
    -v, --version         show program's version number and exit
    -H, --help            Display this information
    etc.

But PythonKit then crashes in:

@discardableResult
    func dynamicallyCall(
        withArguments args: [PythonConvertible] = []) -> PythonObject {
        return try! throwing.dynamicallyCall(withArguments: args)
    }

The crash seems to be caused by a call to sys.exit(0) in the python script just after the argument list is printed, when there are no arguments. The script works normally if I use it in the terminal.

So, can someone tell me how to call a python script that expects arguments, from PythonKit?

Also, is there something that I could do to prevent a crash if there are no arguments?

CodePudding user response：

I'm not familiar with swift but know that python getting arguments from sys.argv list

So how about try to add arguments directly into sys object:

let sys = Python.import("sys")
sys.path.append(“/Path/To/Script/Directory/“)
sys.argv.append("-v")
var example = Python.import(“my_script”)
example.main()