[LNT] Declare support for Python 3.6+

[thopre]

Summary

With all tests passing on Python 3.6, this commit declare support for
Python 3.6+. We can lower the requirement later if necessary.

[PrzemekWirkus]

setup.py

12

if sys.version_info[:2] < (3, 6) and sys.version_info[:2] != (2, 7):
                   ^^^^

131

I've learnt a new thing today :)

[thopre]

setup.py

12

The {:2] is not necessary here due to how comparison works on tuples (from https://docs.python.org/3/reference/expressions.html#value-comparisons):

Lexicographical comparison between built-in collections works as follows:

For two collections to compare equal, they must be of the same type, have the same length, and each pair of corresponding elements must compare equal (for example, [1,2] == (1,2) is false because the type is not the same).

Collections that support order comparison are ordered the same as their first unequal elements (for example, [1,2,x] <= [1,2,y] has the same value as x <= y). If a corresponding element does not exist, the shorter collection is ordered first (for example, [1,2] < [1,2,3] is true).

So any (3, 6, *) will be greater than (3, 6) and any (3, 5, *) will be smaller than (3, 6)

131

Are you aware of a more succint way?

[PrzemekWirkus]

setup.py

131

No, this is the fist time I can this used this way.
That's why I wrote that I've learnt a new thing (this was no sarcasm, or anything, just new thing for me).

[thopre]

Committed as e3f5ef6decd5a6eaa96b0286aa8798e951b0c640

setup.py

 try:
     from pip.req import parse_requirements
 except ImportError:
     # The req module has been moved to pip._internal in the 10 release.
     from pip._internal.req import parse_requirements
 import lnt
 import os
 from sys import platform as _platform
 import sys
 from setuptools import setup, find_packages, Extension
 
-if sys.version_info < (2, 7):
-    raise RuntimeError("Python 2.7 or higher required.")
+if sys.version_info < (3, 6) and sys.version_info[:2] != (2, 7):
+    raise RuntimeError("Python 2.7 or Python 3.6 or higher required.")
 
 cflags = []
 
 if _platform == "darwin":
     os.environ["CC"] = "xcrun --sdk macosx clang"
     os.environ["CXX"] = "xcrun --sdk macosx clang"
     cflags += ['-stdlib=libc++', '-mmacosx-version-min=10.7']
 
entry_points={
         'console_scripts': [
             'lnt = lnt.lnttool:main',
         ],
     },
     install_requires=reqs,
 
     ext_modules=[cPerf],
 
-    python_requires='>=2.7',
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*',
 )