docstr: Acquires lock and appends value to the content.
  
  >>> q1 = ThreadSafeQueue()
  >>> q1
  []
  >>> q1.append(1)
  [1]
docstr_tok: ["Acquires","lock","and","appends","value","to","the","content",".",">",">",">","q1","=","ThreadSafeQueue","(",")",">",">",">","q1","[","]",">",">",">","q1.append","(","1",")","[","1","]"]
code: def append(self, value):
      """
      Acquires lock and appends value to the content.
  
      >>> q1 = ThreadSafeQueue()
      >>> q1
      []
      >>> q1.append(1)
      [1]
  
      """
      with self.lock:
          self.content.append(value)
  
imports: import abc
  import random
  import threading
label_desc: Use image node_id 4 for calling the ThreadSafeQueue obj's underlying member method code with example usage: obj.append(value) without return types