[issue9940] Strange error reporting with with statement

2010-09-25 Thread Georg Brandl 

Georg Brandl ge...@python.org added the comment:

At least not without losing generality, and we don't like that.

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nosy: +georg.brandl

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[issue9940] Strange error reporting with with statement

2010-09-24 Thread Antoine Pitrou 

New submission from Antoine Pitrou pit...@free.fr:

Under 3.2 and 3.1:

 with open(foo, wb) as x: pass
... 
 with open(foo, wb) as (x, y): pass
... 
Traceback (most recent call last):
  File stdin, line 1, in module
io.UnsupportedOperation: read

Similar oddities under 2.7:

 with open(foo, wb) as (x, y): pass
... 
Traceback (most recent call last):
  File stdin, line 1, in module
IOError: File not open for reading
 with io.open(foo, wb) as (x, y): pass
... 
Traceback (most recent call last):
  File stdin, line 1, in module
io.UnsupportedOperation: read

--
components: Interpreter Core, Library (Lib)
messages: 117299
nosy: benjamin.peterson, pitrou, stutzbach
priority: normal
severity: normal
status: open
title: Strange error reporting with with statement
type: behavior
versions: Python 2.7, Python 3.1, Python 3.2

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[issue9940] Strange error reporting with with statement

2010-09-24 Thread Amaury Forgeot d'Arc 

Amaury Forgeot d'Arc amaur...@gmail.com added the comment:

Of course, you get the same error with:

 f = open('foo', 'wb')
 x, y = f
Traceback (most recent call last):
  File stdin, line 1, in module
IOError: File not open for reading

i.e. the tuple assignment iterates over the file, and calls readline()

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nosy: +amaury.forgeotdarc

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[issue9940] Strange error reporting with with statement

2010-09-24 Thread Benjamin Peterson 

Benjamin Peterson benja...@python.org added the comment:

I would say it's strange but correct. (and unavoidable I think)

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resolution:  - invalid
status: open - closed

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