[issue33401] `exec` attribute can't be set to objects in Python2 (SyntaxError)

[Emanuel Barry]

Emanuel Barry  added the comment:

Any valid variable name can be used as a an attribute; for example, "spam" is 
valid while "spam-eggs" is not. This isn't unique to classes, but to all 
assignments everywhere. If we allowed `o.exec = blah` then we should also allow 
`exec = blah` at the global scope and that's a whole load of not happening, 
much less in Python 2 (which isn't getting any significant updates anymore).

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue33401] `exec` attribute can't be set to objects in Python2 (SyntaxError)

[luav]

luav  added the comment:

I'm sorry for the previous question, now it's clear (the space is allowed after 
the '.' which complicates the parsing):
```
>>> o.e = 1
>>> o. e
1
>>> o.e
1

```

Anyway, it would be nice to outline the eligible values for attributes in the 
documentation (https://docs.python.org/2/tutorial/classes.html).

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue33401] `exec` attribute can't be set to objects in Python2 (SyntaxError)

[luav]

luav  added the comment:

Why Python 2 documentation does not outline that keywords / statements can't be 
used as the object attributes?
https://docs.python.org/2/reference/simple_stmts.html#exec

And why does this restriction exist at all? The keywords always stand-alone and 
newer follow '.', i.e. always distinguishable from the object attributes.

--

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue33401] `exec` attribute can't be set to objects in Python2 (SyntaxError)

[Emanuel Barry]

Emanuel Barry  added the comment:

This is because `exec` is a keyword in Python 2, whereas in Python 3 it's a 
function.

--
nosy: +ebarry
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue33401] `exec` attribute can't be set to objects in Python2 (SyntaxError)

[luav]

New submission from luav :

The following code works fine on Python 3.5.2 but `exec` attribute fails to be 
set to the object on Python 2.7.12:
```python
>>> o = type('O', (object,), {})
>>> o.e = 1
>>> o.eval = 1
>>> o.exec = 1
  File "", line 1
o.exec = 1
 ^
SyntaxError: invalid syntax
```

OS Environments:  Ubuntu 16.04.4 LTS x64

--
components: Interpreter Core
messages: 316015
nosy: luav
priority: normal
severity: normal
status: open
title: `exec` attribute can't be set to objects in Python2 (SyntaxError)
type: behavior
versions: Python 2.7

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com