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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 chhome(name, home, persist=False):
    '''
    Set a new home directory for an existing user

    name
        Username to modify

    home
        New home directory to set

    persist : False
        Set to ``True`` to prevent configuration files in the new home
        directory from being overwritten by the files from the skeleton
        directory.

    CLI Example:

    .. code-block:: bash

        salt '*' user.chhome foo /home/users/foo True
    '''
    pre_info = info(name)
    if not pre_info:
        raise CommandExecutionError(
            'User \'{0}\' does not exist'.format(name)
        )
    if home == pre_info['home']:
        return True
    cmd = ['usermod', '-d', home]
    if persist:
        cmd.append('-m')
    cmd.append(name)
    __salt__['cmd.run'](cmd, python_shell=False)
    return info(name).get('home') == home