Hello could you please tell what does window_delay mean here? def __init__(self, hostname='localhost', port=1972, n_channels=16

Question

import sys
import time
import socket
import numpy as np
from FieldTrip import Client

class BCI:
def __init__(self, hostname='localhost', port=1972, n_channels=16, window_delay=50):
self.client = Client()
self.n_channels = n_channels
self.data_x = np.zeros((0, n_channels))
self.data_y = []
while not self.client.isConnected:
try:
self.client.connect(hostname, port)
except socket.error:
print("Failed to connect at " + hostname + ":" + str(port))
time.sleep(1)
self.buffer_start_index = self.client.poll()[0]
self.transition_indexes = [self.client.poll()[0] - self.buffer_start_index]
self.transition_classes = []
self.min_rows_per_chunk = sys.float_info.max
self.window_delay = window_delay

def set_new_class(self, new_class):
poll = self.client.poll()[0]
self.transition_indexes += [poll - self.buffer_start_index]
self.transition_classes += [new_class]
if poll - self.buffer_start_index > 100000 or new_class is None:
self.transition_indexes = self.transition_indexes[:-1]
self.transition_classes = self.transition_classes[:-1]
try:
self.data_x = np.vstack((self.data_x, self.client.getData([self.buffer_start_index + self.window_delay,
self.buffer_start_index +
self.transition_indexes[-1] +
self.window_delay])))
except:
time.sleep(1)
self.data_x = np.vstack((self.data_x, self.client.getData([self.buffer_start_index + self.window_delay,
self.buffer_start_index + 1 +