Version 2016.05: Python 3.5.1. Building python packages . error: Download error on https://pypi.python.org/simple/: unknown url type: https

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from urllib.request import urlopen
urlopen('https://askubuntu.com').read()

Hello,
Searching for solution I've found that this error is connected with ssl access in buildroot's host python3 installation.
If I run exact python3 from buildroot (./output/host/usr/bin/python3) and enter code to test https connection:

Python 3.5.1 (default, Jul 3 2016, 21:09:24)
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.

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from urllib.request import urlopen
urlopen('https://askubuntu.com').read()

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"/home/pborut/strhub/2/buildroot2/output/host/usr/lib/python3.5/urllib/request.py", line 162, in urlopen
return opener.open(url, data, timeout)
...
File
"/home/pborut/strhub/2/buildroot2/output/host/usr/lib/python3.5/urllib/request.py", line 1310, in unknown_open
raise URLError('unknown url type: %s' % type)
urllib.error.URLError: <urlopen error unknown url type: https>

which is same error message I get while building module.

I have built buildroot configuration with python3, I have ssl option checked, I have openssl package also selected.

I'm running 64-bit LinuxMint vm (ubuntu) with Python3 3.4.3, works normal.

Do you have any suggestion on what else to check to get over this issue?