def is_toolbelt_installed(
    default_command=["heroku", "--version"],
    default_test_string="heroku-toolbelt"
):

    try:
        p = subprocess.Popen(
            default_command,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )
    except __HOLE__:
        return False

    version_info = p.stdout.readlines()
    p.kill()

    if len(version_info):
        return version_info[0].startswith(default_test_string)

    return False
dataset/ETHPy150Open wercker/wercker-cli/werckercli/heroku.py/is_toolbelt_installed