function prompt {
    $prompt_str = ""

    # GIT branch
    $git_prompt = git branch | foreach { if ($_ -match "^\*(.*)"){ $matches[1] } }
    $prompt_str += "$git_prompt || "

    # Python
    $py_prompt = python --version
    $prompt_str += "$py_prompt || "

    # short path
    $p = Split-Path -leaf -path (Get-Location)
    $prompt_str += "$p"

    Write-Host ($prompt_str)
    return ""
}