[issue1863] NameError with genexp in class scope
Georg Brandl added the comment: Amaury Forgeot d'Arc schrieb: Well, I'm not sure that the genexpr can be considered as a method, but it is certainly a nested code block. Technically it is a method, that's why this happens. I added a note to the docs in r60051; closing this as won't fix. -- nosy: +georg.brandl resolution: - wont fix status: open - closed __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
Facundo Batista added the comment: Yes, something was bad with my test. Now I have the same behaviour. Sorry for the noise. __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
Amaury Forgeot d'Arc added the comment: Facundo, are your sure that your output starts from a fresh environment? I get: C:\Python25python Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. class C: ... a = 42 ... list(a for _ in 'x') ... Traceback (most recent call last): File stdin, line 1, in module File stdin, line 3, in C File stdin, line 3, in genexpr NameError: global name 'a' is not defined This error is actually approximately documented in an obscure sentence in http://docs.python.org/dev/reference/executionmodel.html#naming The scope of names defined in a class block is limited to the class block; it does not extend to the code blocks of methods. Well, I'm not sure that the genexpr can be considered as a method, but it is certainly a nested code block. -- nosy: +amaury.forgeotdarc __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
Facundo Batista added the comment: Don't follow you: class C: a = 42 list(a for _ in 'x') Works here! (Python 2.5.1 on win32) -- nosy: +facundobatista __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
New submission from Willard: The following code does not work like expected, it triggers a NameError. class C: a = 42 list(a for _ in 'x') NameError: global name 'a' is not defined This issue was discussed on comp.lang.python in the thread Is this a bug, or is it me?. -- components: Interpreter Core messages: 60060 nosy: cptnwillard severity: minor status: open title: NameError with genexp in class scope type: behavior versions: Python 2.5 __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
Raymond Hettinger added the comment: I don't follow what you mean. Can you post a working version of the code fragment? -- nosy: +rhettinger __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1863] NameError with genexp in class scope
Guido van Rossum added the comment: It's a weakness, not a bug. Just use a different variable name besides 'a'. -- nosy: +gvanrossum __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1863 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
