is.py

is.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+
+"""
+is.py
+~~~~~
+
+System environment flags.
+"""
+
+
+import sys
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+py2 = (_ver[0] == 2)
+
+#: Python 3.x?
+py3 = (_ver[0] == 3)
+
+#: Python 3.0.x
+py30 = (py3 and _ver[1] == 0)
+
+#: Python 3.1.x
+py31 = (py3 and _ver[1] == 1)
+
+#: Python 3.2.x
+py32 = (py3 and _ver[1] == 2)
+
+#: Python 3.3.x
+py33 = (py3 and _ver[1] == 3)
+
+#: Python 3.4.x
+py34 = (py3 and _ver[1] == 4)
+
+#: Python 2.7.x
+py27 = (py2 and _ver[1] == 7)
+
+#: Python 2.6.x
+py26 = (py2 and _ver[1] == 6)
+
+#: Python 2.5.x
+py25 = (py2 and _ver[1] == 5)
+
+#: Python 2.4.x
+py24 = (py2 and _ver[1] == 4)   # I'm assuming this is not by choice.
+
+
+# ---------
+# Platforms
+# ---------
+
+
+# Syntax sugar.
+_ver = sys.version.lower()
+
+pypy = ('pypy' in _ver)
+jython = ('jython' in _ver)
+ironpython = ('iron' in _ver)
+
+# Assume CPython, if nothing else.
+cpython = not any((pypy, jython, ironpython))
+
+# Windows-based system.
+windows = 'win32' in str(sys.platform).lower()
+
+# Standard Linux 2+ system.
+linux = ('linux' in str(sys.platform).lower())
+osx = ('darwin' in str(sys.platform).lower())
+hpux = ('hpux' in str(sys.platform).lower())   # Complete guess.
+solaris = ('solaris' in str(sys.platform).lower())   # Complete guess.
+