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Can't install tornado

I am setting up tensorflow and i got this output:
ERROR: matplotlib 1.3.1 requires nose, which is not installed.
so i am doing
sudo easy_install tornado
and i got as output:
earching for tornado
Reading https://pypi.python.org/simple/tornado/
Download error on https://pypi.python.org/simple/tornado/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
Couldn't find index page for 'tornado' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
Download error on https://pypi.python.org/simple/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
No local packages or download links found for tornado
error: Could not find suitable distribution for Requirement.parse('tornado')
what should i do?
thanks
francesco
ERROR: matplotlib 1.3.1 requires nose, which is not installed.

It seems that you are running the command behind a proxy or a firewall. If this is the case, then you need to set the corresponding environment variables:
set http_proxy="username:password#host:port"
set https_proxy="username:password#host:port"
Otherwise, you can install tornado using pip by running (if you are not behind a proxy, then ignore --proxy):
pip --proxy http://user:password#proxy-host:port install tornado
EDIT: I would suggest to run
sudo -H pip install --ignore-installed matplotlib
in order to install the required packages and ignore the current version.

I can not install the django-constance, with error of Could not find a version that satisfies the requirement django-constance (from versions: )

From the constance docs:
install the constance:
pip install django-constance
But I can not install it, with the error log:
$ pip3 install django-constance
Collecting django-constance
Could not fetch URL https://pypi.python.org/simple/django-constance/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skipping
Could not find a version that satisfies the requirement django-constance (from versions: )
No matching distribution found for django-constance

Check the python version you are running on e.g. 2.7 or 3.5. Then get an appropriate package version for the respective version you have and install it with pip install package-name==%.%.%where %.%.%Is the package version for your python version. Note that some packages are only released for only python2 while others are for python 3

The following output of your console:
There was a problem confirming the ssl certificate
indicates that there was a network problem while you were trying to install this dependency. It seems like it could be related to this issue:
pip install fails with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)"
solution propesed there was:
You may want to add the trusted hosts and proxy to your config file.
pip.ini (Windows) or pip.conf (unix)
[global]
trusted-host = pypi.python.org
pypi.org
files.pythonhosted.org
I hope that this helps.

Error while installing jupyter

I'm getting below error while installing Jupiter, does anyone came across similar issues.
pip3.5 install jupyter
Collecting jupyter
/grid/common/pkgs/python/v3.5.2/lib/python3.5/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
SNIMissingWarning
Could not fetch URL https://pypi.python.org/simple/jupyter/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skipping
Could not find a version that satisfies the requirement jupyter (from versions: )
No matching distribution found for jupyter
Here are the env details
OS: RHEL6
Python - 3.5.2
Pip: 9.0.1
Curl: 7.47.1
Openssl 1.0.1e

You can:
Go to Python root folder and run the "Install Certificates.command" file.
You may follow https://www.youtube.com/watch?v=BVS3U1OQzO4

Pip SSL error on Mac

I keep getting this SSL error when using pip on my mac. I have done a fresh install of the OS and it hasn't made any different. Turning the firewall off also doesn't make any difference. Anyone got any ideas?
Here's the error:
> Seans-Mac-mini:~ seanhatch$ pip3 install discord.py
Collecting discord.py
Could not fetch URL https://pypi.python.org/simple/discord-py/: There was a problem confirming the ssl certificate: EOF occurred in violation of protocol (_ssl.c:719) - skipping
Could not find a version that satisfies the requirement discord.py (from versions: )
No matching distribution found for discord.py
Discord.py was used as an example but it doesn't work for any packages.

pip install issue with ssl certificate:[SSL: TLSV1_ALERT_ACCESS_DENIED]

Pip version:9.0.1
Python version:3.6.3
Operating system:Win7
Description:
I'm trying to install python libraries in my laptop but run into an SSL certificate error when running pip -install for any library. I have tried several suggestions from other posts but all of them didn't work.
Can someone kindly help me to resolve this SSL issue? Thanks in advance.
What I've run:
C:\Users\zhouweiq>pip install requests
Collecting requests
Could not fetch URL https://pypi.python.org/simple/requests/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_ACCESS_DENIED] tlsv1 alert access denied (_ssl.c:777) - skipping
Could not find a version that satisfies the requirement requests (from versions: )
No matching distribution found for requests

I also got the same issue but after configuring proxy it resolved.
Proxy in Windows-> internet options-> connections -> LAN settings.