"W W" <sri...@gmail.com> wrote
( Multiple constructors (or factory methods) is one feature I would
like
to see added to Python! )
Wouldn't it be possible to create sort of a... bastardization? i.e.
def __init__(self, *args):
if len(args) == 0:
#do something
if len(args) == 1:
#do something else
Or would that create more problems than is worth it?
Thats the standard workaround but its not clean and certainly
not self documenting. Its also not reliable becaause thre is nothing
to stop someone calling it with the first argument of the 2 arg case
(a filename maybe?) and then it gets treated as a single arg case
( a tuple of values say?) Oops!
Whereas in C++/Java style you could say
class C:
@constructor
def C(fname, count);...
@constructor
def C(valueTuple):....
etc.
Or in Delphi style:
class C:
@constructor
def LoadFromFile(fname, count): ...
@constructor
def Create(valueTuple):...
Personally I prefer the Delphi style sincve it makes the constructor
call explicit and adds to the documentation.
Alan G
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