alias django-admin-jy="jython /path/to/jython-dev/dist/bin/django-admin.py"

The term 'which' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spell
ing of the name, or if a path was included, verify that the path is correct and try again.
At C:UsersDanDocumentsWindowsPowerShellMicrosoft.PowerShell_profile.ps1:9 char:27

+             $cmd = @(which <<<<  $_.Content)[0]
    + CategoryInfo          : ObjectNotFound: (which:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

function django-admin-jy {
    jython.exe /path/to/jython-dev/dist/bin/django-admin.py @args
}

function New-BashStyleAlias([string]$name, [string]$command)
{
    $sb = [scriptblock]::Create($command)
    New-Item "Function:global:$name" -Value $sb | Out-Null
}

New-BashStyleAlias django-admin-jy 'jython.exe /path/to/jython-dev/dist/bin/django-admin.py @args'