[issue14350] Strange Exception from copying an iterable

2012-03-19 Thread Ramchandra Apte 

Ramchandra Apte maniandra...@gmail.com added the comment:

BTW, can we add support for copying iterators by using itertools.tee

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[issue14350] Strange Exception from copying an iterable

2012-03-18 Thread Jakob Bowyer 

Jakob Bowyer jkb...@gmail.com added the comment:

C:\Users\Jakobpython -c import copy; copy.copy(iter([1,2,3]))
Traceback (most recent call last):
  File string, line 1, in module
  File T:\languages\Python27\lib\copy.py, line 96, in copy
return _reconstruct(x, rv, 0)
  File T:\languages\Python27\lib\copy.py, line 329, in _reconstruct
y = callable(*args)
  File T:\languages\Python27\lib\copy_reg.py, line 93, in __newobj__
return cls.__new__(cls, *args)
TypeError: object.__new__(listiterator) is not safe, use listiterator.__new__()

C:\Users\Jakobpython3 -c import copy; copy.copy(iter([1,2,3]))
Traceback (most recent call last):
  File string, line 1, in module
  File T:\languages\Python32\lib\copy.py, line 97, in copy
return _reconstruct(x, rv, 0)
  File T:\languages\Python32\lib\copy.py, line 285, in _reconstruct
y = callable(*args)
  File T:\languages\Python32\lib\copyreg.py, line 88, in __newobj__
return cls.__new__(cls, *args)
TypeError: object.__new__(list_iterator) is not safe, use 
list_iterator.__new__()

Pure python traceback. Just for clarity.

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[issue14350] Strange Exception from copying an iterable

2012-03-17 Thread Jakob Bowyer 

New submission from Jakob Bowyer jkb...@gmail.com:

Running:
Python 2.7.2 (default, Jun 12 2011, 14:24:46) [MSC v.1500 64 bit (AMD64)]
Code:
import copy
copy.copy(iter([1,2,3]))
Exception:

---
TypeError Traceback (most recent call last)
T:\languages\Python27\Scripts\ipython-input-2-4b0069a09ded in module()
 1 copy.copy(iter([1,2,3]))

T:\languages\Python27\lib\copy.pyc in copy(x)
 94 raise Error(un(shallow)copyable object of type %s % cl
s)
 95
--- 96 return _reconstruct(x, rv, 0)
 97
 98

T:\languages\Python27\lib\copy.pyc in _reconstruct(x, info, deep, memo)
327 if deep:
328 args = deepcopy(args, memo)
-- 329 y = callable(*args)
330 memo[id(x)] = y
331

T:\languages\Python27\lib\copy_reg.pyc in __newobj__(cls, *args)
 91
 92 def __newobj__(cls, *args):
--- 93 return cls.__new__(cls, *args)
 94
 95 def _slotnames(cls):

TypeError: object.__new__(listiterator) is not safe, use listiterator.__new__()

Either this is a bug or not a clear error message in the exception

--
components: None
messages: 156189
nosy: Jakob.Bowyer
priority: normal
severity: normal
status: open
title: Strange Exception from copying an iterable
type: behavior
versions: Python 2.7

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[issue14350] Strange Exception from copying an iterable

2012-03-17 Thread Ramchandra Apte 

Ramchandra Apte maniandra...@gmail.com added the comment:

I get a normal exception.
I see ipython at the top level in 
'T:\languages\Python27\Scripts\ipython-input-2-4b0069a09ded in module()'
Perhaps you ran ipython accidentally?

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[issue14350] Strange Exception from copying an iterable

2012-03-17 Thread R. David Murray 

R. David Murray rdmur...@bitdance.com added the comment:

@Ramchandra: I think you referring to the traceback format (which is indeed 
less useful than a normal Python traceback in the context of this tracker).  
The OP, however, is referring to the exception itself:

  TypeError: object.__new__(listiterator) is not safe, use 
listiterator.__new__()

This is indeed a bit unexpected, though I don't know that copying iterators is 
actually supported.

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[issue14350] Strange Exception from copying an iterable

2012-03-17 Thread R. David Murray 

Changes by R. David Murray rdmur...@bitdance.com:


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versions: +Python 3.2, Python 3.3

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