Cannot install py2neo: cannot import name SSLContext

[Alan Robertson]

Hi,

When I try and do a pip install "py2neo>2.0.7", I get the same error on exactly two versions of Linux:
Ubuntu precise and Debian wheezy. The errors are reproducible. Re-creating a clean build environment from scratch doesn't help. The builds are exactly the same ones that I used to put out the 1.0.3 version at the end of February - and it all worked then. See https://github.com/nigelsmall/py2neo/issues/487 for the GitHub issue.

These versions all work:

CentOS centos7
CentOS6
openSUSE 13.2
openSUSE 42.1
Ubuntu trusty
Ubuntu vivid
Ubuntu wily
Debian jessie
Fedora 21
Fedora 22

Here's the error from Ubuntu precise:

Step 14 : RUN pip install ctypesgen 'py2neo>2.0.7' getent
---> Running in 6a80194d49c4
Downloading/unpacking ctypesgen
 Running setup.py egg_info for package ctypesgen
    
Downloading/unpacking py2neo>2.0.7
 Running setup.py egg_info for package py2neo
   Traceback (most recent call last):
     File "<string>", line 14, in <module>
     File "/build/py2neo/setup.py", line 26, in <module>
       from py2neo import __author__, __email__, __license__, __package__, __version__
     File "py2neo/__init__.py", line 28, in <module>
       from py2neo.database import *
     File "py2neo/database/__init__.py", line 26, in <module>
       from py2neo.database.cypher import cypher_escape, cypher_repr
     File "py2neo/database/cypher.py", line 24, in <module>
       from py2neo.types import Node, Relationship, Path
     File "py2neo/types.py", line 23, in <module>
       from py2neo.database.http import Resource
     File "py2neo/database/http.py", line 20, in <module>
       from py2neo.database.auth import ServerAddress, keyring
     File "py2neo/database/auth.py", line 22, in <module>
       from py2neo.packages.neo4j.v1 import basic_auth
     File "py2neo/packages/neo4j/v1/__init__.py", line 22, in <module>
       from .session import *
     File "py2neo/packages/neo4j/v1/session.py", line 32, in <module>
       from ssl import SSLContext, PROTOCOL_SSLv23, OP_NO_SSLv2, CERT_REQUIRED
   ImportError: cannot import name SSLContext

--

Alan Robertson / CTO
Al...@AssimilationSystems.com / +1 303.947.7999

Assimilation Systems Limited
http://AssimilationSystems.com

[Christoph Pingel]

Which version of pip/Python are you using?

ssl.SSLContext is only available in Python 2.7.9 or later: https://docs.python.org/2/library/ssl.html#ssl.SSLContext

Hope this helps,

best regards,

Christoph

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[Christoph Pingel]

BTW, I could reproduce this error on my Ubuntu 12.04 Server with Python 2.7.3, but I didn't have to install py2neo there (yet).

best,

Christoph

[Nigel Small]

This will downgrade gracefully in the next beta release. For versions of 2.7 earlier than 2.7.9, SSL will be unavailable but the library should load correctly.