Schüle Daniel <[EMAIL PROTECTED]> writes: > Hello, > > first question > > In [117]: cmp("ABC",['A','B','C']) > Out[117]: 1 > > against what part of the list is the string "ABC" compared?
Why "part"? There are two objects; they are compared to each other. How this comparison is implemented is a matter handled by the class of each object. > second question > > In [119]: class X(object): > .....: pass > .....: > > In [120]: X() < X() > [... differing results ...] > > class X does not implement < and cmp > what is this comparision is based on? Classes can implement various functions to allow comparisons to work: <URL:http://docs.python.org/ref/customization.html#l2h-187> In the absence of those, the comparison's result is (I believe) implementation-dependent -- which means, "don't rely on any particular behaviour". > third question > > sort([[1,2,3],["ABC"],['Z','A'], X(), 4) >>> sort([[1,2,3],["ABC"],['Z','A'], X(), 4) File "<stdin>", line 1 sort([[1,2,3],["ABC"],['Z','A'], X(), 4) ^ SyntaxError: invalid syntax Care to give an actual example? -- \ "I went to the hardware store and bought some used paint. It | `\ was in the shape of a house." -- Steven Wright | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list