Bugs item #1326195, was opened at 2005-10-13 22:56 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1326195&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.3 Status: Open Resolution: None Priority: 5 Submitted By: Johan Hidding (jhidding) Assigned to: Nobody/Anonymous (nobody) Summary: odd behaviour when making lists of lambda forms Initial Comment: Hi, I don't know if this is really a bug, but it is odd. I tried to make a list of lambda forms like in the following example, but the functions thus created don't really do what I expect. ************** Python 2.3.5 (#2, Jun 19 2005, 13:28:00) [GCC 3.3.6 (Debian 1:3.3.6-6)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> p = [lambda t: t**n for n in range(6)] >>> p[0](2) 32 >>> p [<function <lambda> at 0xb7cece64>, <function <lambda> at 0xb7cf10d4>, <function <lambda> at 0xb7cf1b1c>, <function <lambda> at 0xb7cf1b54>, <function <lambda> at 0xb7cf1b8c>, <function <lambda> at 0xb7cf1bc4>] >>> p[1](2) 32 >>> p[1](5) 3125 **************** While: **************** >>> q = [lambda t: 1, lambda t: t, lambda t: t**2, lambda t: t**3, lambda t: t**4] >>> q[0](4) 1 >>> q[1](4) 4 >>> q[2](4) 16 *************** I tried creating the list using a for loop, but it shows the same weird behaviour. Also any attempt to put the lambda form in an object didn't give a cure. say: Wrap(lambda x: x**2) creates a callable object storing the lambda form as a data member. **** >>> j = [Wrap(lambda t: t**n) for n in range(5)] >>> j[0](1) 1 >>> j[0](3) 81 >>> j[0](5) 625 **** Both Python 2.3 and 2.4 show this behaviour. Am I completely overlooking something, or...? kind regards, Johan Hidding Groningen, the Netherlands ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1326195&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
