# -*- test-case-name: twisted -*-

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.


"""
Twisted: The Framework Of Your Internet.
"""

def _checkRequirements():
# Don't allow the user to run a version of Python we don't support.
import sys

version = getattr(sys, "version_info", (0,))
if version < (2, 6):
raise ImportError("Twisted requires Python 2.6 or later.")
if version < (3, 0):
required = "3.6.0"
else:
required = "4.0.0"

if ("setuptools" in sys.modules and
getattr(sys.modules["setuptools"],
"_TWISTED_NO_CHECK_REQUIREMENTS", None) is not None):
# Skip requirement checks, setuptools ought to take care of installing
# the dependencies.
return

# Don't allow the user to run with a version of zope.interface we don't
# support.
required = "Twisted requires zope.interface %s or later" % (required,)
try:
from zope import interface
except ImportError:
# It isn't installed.
raise ImportError(required + ": no module named zope.interface.")
except:
# It is installed but not compatible with this version of Python.
raise ImportError(required + ".")
try:
# Try using the API that we need, which only works right with
# zope.interface 3.6 (or 4.0 on Python 3)
class IDummy(interface.Interface):
pass
@interface.implementer(IDummy)
class Dummy(object):
pass
except TypeError:
# It is installed but not compatible with this version of Python.
raise ImportError(required + ".")

_checkRequirements()

# Ensure compat gets imported
from twisted.python import compat

# setup version
from twisted._version import version
__version__ = version.short()

del compat