title: ImportError: cannot import name 'constants'
body: <p>I need to import the constants library but it is not working...</p>
  
  <pre><code>import spacy
  import pandas
  import textacy
  import pandas as pd
  from pandas import Series
  from . import constants
  </code></pre>
  
  <p>Erreur:</p>
  
  <pre><code>ImportError                               Traceback (most recent call last)
  &lt;ipython-input-49-df52595371dd&gt; in &lt;module&gt;()
    4 import pandas as pd
    5 from pandas import Series
  ----&gt; 6 from . import constants
  
  ImportError: cannot import name 'constants'
  </code></pre>
  
  <p>I am using anaconda 3 on windows 10 and tried to install this library with the conda:</p>
  
  <pre><code>conda install -c auto constants
  </code></pre>
  
  <p>But it still does not work...</p>