[Python-bugs-list] [ python-Bugs-757818 ] tuple assignment -- SystemError: unknown opcode

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Bugs item #757818, was opened at 2003-06-20 07:19
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Category: Python Interpreter Core
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Mark J (average)
Assigned to: Nobody/Anonymous (nobody)
Summary: tuple assignment -- SystemError: unknown opcode

Initial Comment:
Python 2.3b1 (#2, Jun  4 2003, 03:08:06)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
>>> i,j = True and (1, -1) or (-1, 1)
XXX lineno: 1, opcode: 0
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
SystemError: unknown opcode
>>> i,j = True and (1, -1)  #works
>>> True and (1, -1) or (-1, 1)  #also works
(1, -1)
>>> i,j = (1, -1) or (-1, 1) #nope
XXX lineno: 1, opcode: 0
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
SystemError: unknown opcode
>>> i,j = False and (1, -1) or (-1, 1) #works
>>> i,j
(-1, 1)

Thanks guys!

Mark

P.S. -1 on keyword initialization of dictionary (Liskov)
P.P.S. +1 on adding keys from iterable

$0.02 (*clink*)

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