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)

Task/Introspection/Python/introspection-2.py

@@ -0,0 +1,4 @@
+try:
+    print abs(bloop)
+except (NameError, TypeError):
+    print "Something's missing"

Task/Introspection/Python/introspection-3.py

@@ -0,0 +1,6 @@
+def sum_of_global_int_vars():
+    variables = vars(__builtins__).copy()
+    variables.update(globals())
+    print sum(v for v in variables.itervalues() if type(v) == int)
+
+sum_of_global_int_vars()