i don't know if they are unique, but my favourite features are: readable and short code (consistent syntax, few keywords) iterpreter (very useful for learning) dir(obj) / vars(obj) (very useful for learning) identation dynamic typing lightweight oo (no public/protected/private) built-in types (list, dict, str have useful methods) iterator protocol generators (yield syntax) list comprehension / generator expression keyword args slicing tuple assignment (unpacking tuple: a,b =1,2) return with multiple values (tuple makes it easy) widespread (it's easy to find a python module for any kind of task) extendible with low-level languages (pyrex/swig/boostpython) crossplatform free
nszabolcs -- http://mail.python.org/mailman/listinfo/python-list
