def set_default_region(region: str):
    """
    Initializes all library clients based on the specified region.  The library clients
    are AWS API clients that give us access to AWS.  Note that if you set the region with
    **aws configure**, that will take precedence.

    :param region: The region that all library clients will be opened with.
    :return: No return value.
    """
    global _region
    _region = region
