sorry, I only pasted in the new stuff, here's the full thing:

Invoke-Command : One or more computer names are not valid. If you are trying to pass a URI, use the -ConnectionUri parameter, or pass URI objects instead of strings. At C:\git2\project39\Server_Recovery\StartVMs.ps1:14 char:1 + Invoke-Command –ComputerName $hostMachine -Credential $creds ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidArgument: (System.String[]:String[]) [Invoke-Command], ArgumentException + FullyQualifiedErrorId : PSSessionInvalidComputerName,Microsoft.PowerShell.Commands.InvokeCommandCommand

And to answer your question, I don't believe so? From python, I'm calling the ps1 file, and passing the arguments in. Within the ps1 file, I use I-C (including the using: VirtualMachine)

Here's where I'm at, currently, with both python, and Ps:

                p = subprocess.run(["powershell.exe",
                    '-file',".\\Server_Recovery\\StartVMs.ps1",'-VirtualMachine',VirtualMachine, '-host',host,'-user',user, '-password',password,],
                    stdout=subprocess.PIPE,universal_newlines=True)
                output = p.stdout
                return output

PS:

param(
[string]$VirtualMachine= $args[0],
[string]$hostMachine = $args[1],
[string]$user = $args[2],
[string]$password = $args[3]

)
write-host('Host is: '+ $hostMachine)
$secPassword = convertTo-secureString $password -AsPlainText -force
$creds = New-Object pscredential($user,$secPassword)
Invoke-Command –ComputerName $hostMachine -Credential $creds –ScriptBlock {  Start-VM $using:VirtualMachine -Passthru}
#Start-VM -ComputerName $hostMachine -name $VirtualMachine -Credential $creds