A-M baby

Task/Introspection/Python/introspection-1.py

@@ -0,0 +1,22 @@
+# Checking for system version
+ import sys
+ major, minor, bugfix = sys.version_info[:3]
+ if major < 2:
+     sys.exit('Python 2 is required')
+
+
+ def defined(name): # LBYL (Look Before You Leap)
+     return name in globals() or name in locals() or name in vars(__builtins__)
+
+ def defined2(name): # EAFP (Easier to Ask Forgiveness than Permission)
+     try:
+          eval(name)
+          return True
+     except NameError:
+          return False
+
+ if defined('bloop') and defined('abs') and callable(abs):
+     print abs(bloop)
+
+ if defined2('bloop') and defined2('abs') and callable(abs):
+     print abs(bloop)