[Python-Dev] {}.first[key,value,item] and {}.pop (was Re: {}.getitem())

Fred L. Drake, Jr. fdrake@acm.org
Thu, 30 Nov 2000 10:34:50 -0500 (EST)

Greg Wilson writes:
 > Should we then add dict.push(), which would add a key/value pair to the
 > dictionary?  I realize it's redundant (same effect as 'dict[x] = y'),

  We don't have [].push(), and I don't think the metaphor really works
well with dictionaries.  There's also an implied ordering relationship
between push() and pop(), and this doesn't hold for dictionaries

 > but I think anyone who's gone through a CS course in data structures
 > and algorithms will expect push() where there's pop(), and it will allow
 > functions to be polymorphic over lists and dicts.

  There's only a limited amount on conceptual polymorphism between the
two; artificial extending that may lead to a lot of programmers using
the wrong structure for their application.


Fred L. Drake, Jr.  <fdrake at acm.org>
PythonLabs at Digital Creations