Hello all.
On page 479, the 2nd edition of the "Learning Python" book, this code
appears
class Derived(Base):
def __init__(self, arg, *args, **kw):
self.__init__(s elf, *args, **kw)
Surely self.__init__ should be
Base.__init__
Everything else in the book has been crystal clear. Up to page 479!
It doesn't appear in the errata. What am I misunderstandin g?
Regards,
Abraham 4 1516 Ab************* *******@yahoo.c om wrote: On page 479, the 2nd edition of the "Learning Python" book, this code appears
class Derived(Base): def __init__(self, arg, *args, **kw): self.__init__(s elf, *args, **kw)
Surely self.__init__ should be
Base.__init__
I don't have a copy within reach, but from what you say, it sure looks
like a typo.
It doesn't appear in the errata. What am I misunderstandin g?
nothing, except perhaps what's the best place to report errors in
O'Reilly books (I'm quite sure they don't read this newsgroup ;-)
there's a "view/submit errata" link on this page: http://www.oreilly.com/catalog/lpython2/
</F> Ab************* *******@yahoo.c om wrote: Hello all.
On page 479, the 2nd edition of the "Learning Python" book, this code appears
class Derived(Base): def __init__(self, arg, *args, **kw): self.__init__(s elf, *args, **kw)
Surely self.__init__ should be
Base.__init__
Everything else in the book has been crystal clear. Up to page 479! It doesn't appear in the errata. What am I misunderstandin g?
Seems to be a typo:
Python 2.4.2 (#1, Jan 23 2006, 21:24:54)
[GCC 3.3.4] on linux2
Type "help", "copyright" , "credits" or "license" for more
information. class A(object):
.... def __init__ (self):
.... print 'Constructing A'
.... class B(A):
.... def __init__ (self):
.... self.__init__ (self)
.... B()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "<stdin>", line 3, in __init__
TypeError: __init__() takes exactly 1 argument (2 given) class C(A):
.... def __init__ (self):
.... A.__init__ (self)
.... C()
Constructing A
<__main__.C object at 0x402cf5ac>
Mel.
Thanks for your help, guys. I'm convinced it is a bug, not a
misunderstandin g. I submitted it to the errata page at O'Reilly.
Regards,
Abraham This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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