Hi Makers, 
I was on a windows machine with zscaler corporate proxy. When I cloned a python github repository and did a
<pre><code class="lang-c">pip install -e .
</code></pre>
I got below error :
<pre><code class="lang-c">ERROR: Could not install packages due to an OSError: 
HTTPSConnectionPool(host='files.pythonhosted.org', port=443):
Max retries exceeded with url: 
(Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] 
certificate verify failed: 
unable to get local issuer certificate (_ssl.c:1006)')))
</code></pre>
In above error, the host url is specified as '<a href="http://files.pythonhosted.org" class="autolinkedURL autolinkedURL-url" target="_blank">files.pythonhosted.org</a>' The solution was to manually go to the host url in chrome : '<a href="http://files.pythonhosted.org" class="autolinkedURL autolinkedURL-url" target="_blank">files.pythonhosted.org</a>' and manually download the ssl certificate crt file. (select crt , chain certificate while exporting) save the crt file in the same location where we are calling pip install. 
Now, run below cmd : 
<pre><code class="lang-less">pip install --trusted-host files.pythonhosted.org autopep8 -e .
</code></pre>
It should hopefully work out :)
Thank you for reading and trying out the tutorial Let us stay in touch - I am <a href="https://hashnode.com/@mrtechmaker" class="user-mention" target="_blank" rel="noopener">@mrtechmaker</a> on twitter / <a href="http://x.com" class="autolinkedURL autolinkedURL-url" target="_blank">x.com</a>

Hi Makers,  
  
I was on a windows machine with zscaler corporate proxy.  
When I cloned a python github repository and did a

```c
pip install -e .
```

I got below error :

```c
ERROR: Could not install packages due to an OSError: 
HTTPSConnectionPool(host='files.pythonhosted.org', port=443):
Max retries exceeded with url:  
(Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] 
certificate verify failed: 
unable to get local issuer certificate (_ssl.c:1006)')))
```

In above error, the host url is specified as 'files.pythonhosted.org'  
The solution was to manually go to the host url in chrome :  
'files.pythonhosted.org'  
and manually download the ssl certificate crt file.  
(select crt , chain certificate while exporting)  
save the crt file in the same location where we are calling pip install.  
  
Now, run below cmd :  

```less
pip install --trusted-host files.pythonhosted.org autopep8 -e .
```

It should hopefully work out :)

  
Thank you for reading and trying out the tutorial  
Let us stay in touch - I am @mrtechmaker on twitter / x.com

python pip CERTIFICATE_VERIFY_FAILED , SSLCertVerificationError error on windows with zscaler