from typing import List
from typing import Dict


def get_instances_from_ip(ip: str, instance_descriptions: List[Dict]) -> List[Dict]:
    """Filter AWS instance_descriptions based on PrivateIpAddress

    :param ip: private IP of AWS instance.
    :param instance_descriptions: list of AWS instance description dicts.
    :returns: list of instance description dicts"""
    instances = [instance for instance in instance_descriptions if instance['PrivateIpAddress'] == ip]
    return instances