title: "RuntimeError: implement_array_function method already has a docstring" when import the chatbot library
body: <p>I'm trying to use the library <code>Chatterbot</code>, but I got this error <code>RuntimeError: implement_array_function method already has a docstring</code> I don't understand! Can you help me?</p>
  <pre><code>from chatterbot import ChatBot
  from chatterbot.trainers import ListTrainer
  
  # Create a new chat bot named Charlie
  chatbot = ChatBot('Charlie')
  
  trainer = ListTrainer(chatbot)
  
  trainer.train([
      &quot;Hi, can I help you?&quot;,
      &quot;Sure, I'd like to book a flight to Iceland.&quot;,
      &quot;Your flight has been booked.&quot;
  ])
  
  # Get a response to the input text 'I would like to book a flight.'
  response = chatbot.get_response('I would like to book a flight.')
  
  print(response)
  </code></pre>
  <pre><code>&gt; &quot;C:\Users\Juan Montañez\PycharmProjects\1\Scripts\python.exe&quot;
  &gt; &quot;C:/Users/Juan Montañez/ChatBot/Perseus/index.py&quot; Traceback (most
  &gt; recent call last):   File &quot;C:/Users/Juan
  &gt; Montañez/ChatBot/Perseus/index.py&quot;, line 1, in &lt;module&gt;
  &gt;     from chatterbot import ChatBot   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\chatterbot\__init__.py&quot;,
  &gt; line 4, in &lt;module&gt;
  &gt;     from .chatterbot import ChatBot   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\chatterbot\chatterbot.py&quot;,
  &gt; line 2, in &lt;module&gt;
  &gt;     from chatterbot.storage import StorageAdapter   File &quot;C:\Users\Juan
  &gt; Montañez\PycharmProjects\1\lib\site-packages\chatterbot\storage\__init__.py&quot;,
  &gt; line 1, in &lt;module&gt;
  &gt;     from chatterbot.storage.storage_adapter import StorageAdapter   File &quot;C:\Users\Juan
  &gt; Montañez\PycharmProjects\1\lib\site-packages\chatterbot\storage\storage_adapter.py&quot;,
  &gt; line 3, in &lt;module&gt;
  &gt;     from chatterbot.tagging import PosHypernymTagger   File &quot;C:\Users\Juan
  &gt; Montañez\PycharmProjects\1\lib\site-packages\chatterbot\tagging.py&quot;,
  &gt; line 3, in &lt;module&gt;
  &gt;     from chatterbot import utils   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\chatterbot\utils.py&quot;,
  &gt; line 4, in &lt;module&gt;
  &gt;     from nltk.corpus import wordnet   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\nltk\__init__.py&quot;, line
  &gt; 129, in &lt;module&gt;
  &gt;     from nltk.collocations import *   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\nltk\collocations.py&quot;,
  &gt; line 40, in &lt;module&gt;
  &gt;     from nltk.metrics import ContingencyMeasures, BigramAssocMeasures, TrigramAssocMeasures, QuadgramAssocMeasures   File &quot;C:\Users\Juan
  &gt; Montañez\PycharmProjects\1\lib\site-packages\nltk\metrics\__init__.py&quot;,
  &gt; line 16, in &lt;module&gt;
  &gt;     from nltk.metrics.scores import (   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\nltk\metrics\scores.py&quot;,
  &gt; line 18, in &lt;module&gt;
  &gt;     from scipy.stats.stats import betai   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\scipy\__init__.py&quot;, line
  &gt; 62, in &lt;module&gt;
  &gt;     from numpy import show_config as show_numpy_config   File &quot;C:\Users\Juan
  &gt; Montañez\PycharmProjects\1\lib\site-packages\numpy\__init__.py&quot;, line
  &gt; 142, in &lt;module&gt;
  &gt;     from . import add_newdocs   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\add_newdocs.py&quot;,
  &gt; line 13, in &lt;module&gt;
  &gt;     from numpy.lib import add_newdoc   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\lib\__init__.py&quot;,
  &gt; line 9, in &lt;module&gt;
  &gt;     from .index_tricks import *   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\lib\index_tricks.py&quot;,
  &gt; line 13, in &lt;module&gt;
  &gt;     import numpy.matrixlib as matrixlib   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\matrixlib\__init__.py&quot;,
  &gt; line 6, in &lt;module&gt;
  &gt;     from .defmatrix import *   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\matrixlib\defmatrix.py&quot;,
  &gt; line 12, in &lt;module&gt;
  &gt;     from numpy.linalg import matrix_power   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\linalg\__init__.py&quot;,
  &gt; line 51, in &lt;module&gt;
  &gt;     from .linalg import *   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\linalg\linalg.py&quot;,
  &gt; line 32, in &lt;module&gt;
  &gt;     from numpy.core.overrides import set_module   File &quot;C:\Users\Juan Montañez\PycharmProjects\1\lib\site-packages\numpy\core\overrides.py&quot;,
  &gt; line 46, in &lt;module&gt;
  &gt;     &quot;&quot;&quot;) RuntimeError: implement_array_function method already has a docstring
  </code></pre>