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import socket

def get_avaliable_port():
    """
    get avaliable port in system
    """
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.bind(("", 0))
    port = s.getsockname()[1]
    s.close()
    return port
    
def is_port_free(port):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    result = s.connect_ex(('127.0.0.1', port)) 
    return result != 0