title: Runtime Error when trying to launch Jupyter Notebook (Python)
body: <p>I usually work with the Jupyter Notebook Interface when programming Python but recently I installed bioservices through pip <a href="http://www.pythonhosted.org/bioservices/" rel="nofollow noreferrer">(Bioservices)</a> and when I tried to open the Jupyter Notebook I get the following RunTime error: </p>
  
  <blockquote>
    <p>~$ jupyter notebook</p>
  </blockquote>
  
  <p>Traceback (most recent call last):</p>
  
  <pre><code>File "/usr/local/bin/jupyter-notebook", line 7, in &lt;module&gt;
  from notebook.notebookapp import main
  
  File "/usr/local/lib/python2.7/dist-packages/notebook/notebookapp.py", line 60, in &lt;module&gt;
  from .services.contents.manager import ContentsManager
  
  File "/usr/local/lib/python2.7/dist-packages/notebook/services/contents/manager.py", line 16, in &lt;module&gt;
  from nbformat import sign, validate, ValidationError
  
  File "/usr/local/lib/python2.7/dist-packages/nbformat/__init__.py", line 33, in &lt;module&gt;
  from .validator import validate, ValidationError
  
  File "/usr/local/lib/python2.7/dist-packages/nbformat/validator.py", line 12, in &lt;module&gt;
  from jsonschema import ValidationError
  
  File "/usr/local/lib/python2.7/dist-packages/jsonschema/__init__.py", line 18, in &lt;module&gt;
  from jsonschema.validators import (
  
  File "/usr/local/lib/python2.7/dist-packages/jsonschema/validators.py", line 8, in &lt;module&gt;
  import requests
  
  File "/home/bioinfo/.local/lib/python2.7/site-packages/requests/__init__.py", line 74, in &lt;module&gt;
  
  raise RuntimeError('Requests dependency \'chardet\' must be version &gt;= 3.0.2, &lt; 3.1.0!')
  
  RuntimeError: Requests dependency 'chardet' must be version &gt;= 3.0.2, &lt; 3.1.0!
  </code></pre>
  
  <p>P.S: I uninstalled bioservices and it did not solve the error! Tried to reinstall chardet but it give the next output:</p>
  
  <blockquote>
    <p>~$ pip install chardet==3.0.2</p>
  </blockquote>
  
  <p>Collecting chardet==3.0.2</p>
  
  <p>Using cached chardet-3.0.2-py2.py3-none-any.whl</p>
  
  <p>Installing collected packages: chardet</p>
  
  <p>Successfully installed chardet-2.3.0</p>