title: trouble installing jupyter lab with pip or conda - Could not find a version that satisfies the requirement ipykernel
body: <p>trouble installing jupyter lab - Could not find a version that satisfies the requirement ipykernel</p>
  
  <pre><code>pip install jupyterlab
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(&lt;pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000277F1AB8C18&gt;, 'Connection to pypi.python.org timed out. (connect timeout=15)')': /simple/ipykernel/
  Could not find a version that satisfies the requirement ipykernel (from notebook&gt;=4.3.1-&gt;jupyterlab) (from versions: )
  No matching distribution found for ipykernel (from notebook&gt;=4.3.1-&gt;jupyterlab)
  </code></pre>
  
  <p>After visiting <a href="https://github.com/pypa/pip/issues/4417" rel="nofollow noreferrer">this Github page</a></p>
  
  <p>I checked the pip version: </p>
  
  <pre><code>C:\Users\xxxx\AppData\Local\Continuum\anaconda3\Scripts&gt;pip --version
  pip 9.0.1 from C:\Users\xxxx\AppData\Local\Continuum\anaconda3\lib\site-packages (python 3.6)
  </code></pre>
  
  <p>and the ipykernel version: </p>
  
  <pre><code>C:\Users\xxxx\AppData\Local\Continuum\anaconda3\Scripts&gt;conda list ipykernel
  </code></pre>
  
  <p>I tried conda forge but still didn't work</p>
  
  <pre><code>conda install -c conda-forge jupyterlab
  Solving environment: failed
  
  CondaHTTPError: HTTP 000 CONNECTION FAILED for url &lt;https://repo.continuum.io/pkgs/pro/noarch/repodata.json.bz2&gt;
  Elapsed: -
  
  An HTTP error occurred when trying to retrieve this URL.
  HTTP errors are often intermittent, and a simple retry will get you on your way.
  ConnectTimeout(MaxRetryError("HTTPSConnectionPool(host='repo.continuum.io', port=443): Max retries exceeded with url: /pkgs/pro/noarch/repodata.json.bz2 (Caused by ConnectTimeoutError(&lt;urllib3.connection.VerifiedHTTPSConnection object at 0x000001F03B89DE10&gt;, 'Connection to repo.continuum.io timed out. (connect timeout=9.15)'))",),)
  </code></pre>