optimalsetup.py 文件源码

def install_package(_package_name, _arguments=None):
    """
    Install the packages listed if not present
    :param _package_name: The package to install
    :param _argument: An optional argument
    :return:
    """
    _installed = []

    import pip

    _exists = None
    if minor < 3:
        import pkgutil
        _exists = pkgutil.find_loader(_package_name)

    elif minor == 3:
        import importlib
        _exists = importlib.find_loader(_package_name)
    else:
        import importlib
        _exists = importlib.util.find_spec(_package_name)

    if _exists is None:
        print(_package_name + " not installed, installing...")
        if _arguments is None:
            pip.main(['install', _package_name])
        else:
            pip.main(['install', _package_name] + _arguments)
        print(_package_name + " installed...")
        return True
    else:
        print(_package_name + " already installed, skipping...")
        return False