En Mon, 21 Apr 2008 15:03:05 -0300, <[EMAIL PROTECTED]> escribió:
What if I say
oath= yield
or
other= yield
?
Does yield evaluate without parenthes? (Eth.)
You can't use yield except in a generator function. From
<http://docs.python.org/ref/yieldexpr.html> and the grammar definition at
<http://docs.python.org/ref/grammar.txt> you can see that
assignment_stmt ::=
(target_list "=")+
(expression_list | yield_expression)
yield_expression ::= "yield" [expression_list]
The last expression_list is optional so a bare yield should be allowed in
the right hand side of an assignment, as if it were `yield None` (I think
such behavior is specified in the original PEP). Let's try:
py> def gen():
... x = yield
... y = yield "second"
... yield x, y
...
py> g = gen()
py> print g.next()
None
py> print g.send(123)
second
py> print g.send(456)
(123, 456)
py> print g.send(789)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
StopIteration
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
