thread_safe_structures.py

from threading import Thread
from threading import Lock

class ThreadSafeList():
    # constructor
    def __init__(self):
        self._list = list()
        self._lock = Lock()

    def append(self, value):
        with self._lock:
            self._list.append(value)

    def pop(self):
        with self._lock:
            return self._list.pop()

    def get(self, index):
        with self._lock:
            return self._list[index]

    def length(self):
        with self._lock:
            return len(self._list)

# Use the queue module (https://docs.python.org/3/library/queue.html) for a thread_safe queue