[Python] Python script with input() and print() do not print when run from PowerShell class...

This script in question runs as expected from powershell:

# scripts.py
x = input("type your input: ")
print(f"your input is: {x}")


But once you wrap it into a module:

class CSV{
[string] $pythonScript

CSV([string] $pythonPath){
$this.pythonScript = $pythonPath
}

[void] Run(){
python $this.pythonScript
}
}


The interactivity is not printed. To run this class, create a new ps1 file as follows and run it

# run.ps1
using module .\module.psm1
$newCSV = [CSV]::new(".\script.py")
$newCSV.Run()


In the terminal:

PS C:\SE_temp_dir> .\run.ps1
test // typed from user input
PS C:\SE_temp_dir>


Notice that no "type your input" or "your input is test" is printed. I have tried many other alternatives:

### module.psm1:
python $this.pythonScript | Write-Output
python $this.pythonScript | Write-Host
python -v $this.pythonScript | Write-Host

### script.py:
print(f"your input is: {x}", flush=True)
import sys; sys.stdout.write(f"your input is: {x}")


But none of them worked. Why does calling a Python script with input()/print() work interactively in plain PowerShell, but not when run inside a method of a PowerShell class? Is this a PowerShell scoping or host behavior issue?

Continue reading...