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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def checkout(cwd,
             remote,
             target=None,
             user=None,
             username=None,
             password=None,
             *opts):
    '''
    Download a working copy of the remote Subversion repository
    directory or file

    cwd
        The path to the Subversion repository

    remote : None
        URL to checkout

    target : None
        The name to give the file or directory working copy
        Default: svn uses the remote basename

    user : None
        Run svn as a user other than what the minion runs as

    username : None
        Connect to the Subversion server as another user

    password : None
        Connect to the Subversion server with this password

        .. versionadded:: 0.17.0

    CLI Example:

    .. code-block:: bash

        salt '*' svn.checkout /path/to/repo svn://remote/repo
    '''
    opts += (remote,)
    if target:
        opts += (target,)
    return _run_svn('checkout', cwd, user, username, password, opts)