@conf
def check_python_version(conf, minver=None):
	assert minver is None or isinstance(minver, tuple)
	pybin = conf.env['PYTHON']
	if not pybin:
		conf.fatal('could not find the python executable')

	# Get python version string
	cmd = pybin + ['-c', 'import sys\nfor x in sys.version_info: print(str(x))']
	debug('python: Running python command %r' % cmd)
	lines = conf.cmd_and_log(cmd).split()
	assert len(lines) == 5, "found %i lines, expected 5: %r" % (len(lines), lines)
	pyver_tuple = (int(lines[0]), int(lines[1]), int(lines[2]), lines[3], int(lines[4]))

	# compare python version with the minimum required
	result = (minver is None) or (pyver_tuple >= minver)

	if result:
		# define useful environment variables
		pyver = '.'.join([str(x) for x in pyver_tuple[:2]])
		conf.env['PYTHON_VERSION'] = pyver

	# Feedback
	pyver_full = '.'.join(map(str, pyver_tuple[:3]))
	if minver is None:
		conf.msg('Checking for python version', pyver_full)
	else:
		minver_str = '.'.join(map(str, minver))
		conf.msg('Checking for python version', pyver_tuple, ">= %s" % (minver_str,) and 'GREEN' or 'YELLOW')

	if not result:
		conf.fatal('The python version is too old, expecting %r' % (minver,))
Return a key suitable for sorting between networks and addresses.
dataset/ETHPy150Open cournape/Bento/bento/backends/waf_tools/custom_python.py/check_python_version--crossover with--dataset/ETHPy150Open uwdata/termite-data-server/web2py/gluon/contrib/ipaddr.py/get_mixed_type_key