Re: [OT] How do I reply to a thread by sending a message to python-list@python.org
2009/8/27 Terry Reedy tjre...@udel.edu: reply-all may send duplicate messages to the author. Not sure of this list. I'm fairly sure Mailman deals with that. -- -David -- http://mail.python.org/mailman/listinfo/python-list
[issue6641] strptime doesn't support %z format ?
David House dmho...@gmail.com added the comment: Yes and no. Firstly, %z isn't listed as deprecated in the documentation of the time module's strftime -- although %Z is (note differing case). Secondly, I still think the bug is invalid, because the documentation of datetime.datetime.strptime says it behaves like time.strptime, whose documentation says only the directives specified in the documentation [of strftime()] are supported. Since we're in the time module, that reference to strftime() means time.strftime(), which doesn't list %z as a directive. Finally, there *is* a confusing docs issue, however: the strftime() behaviour section in the datetime module documentation lists %z as a valid directive, whereas it's not listed in time.strftime. Although these functions have in theory nothing to do with one another, you would in practice expect them to support the same directives. Since in fact the footnote in the documentation of time.strftime() says %z isn't supported by all ANSI C platforms (despite apparently being required by the standard), I suggest that %z be removed from the list of allowed modifiers in the strftime() behaviour section in the datetime module documentation. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6641 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: ignored test cases in unittest
2009/8/16 Terry terry.yin...@gmail.com: Thanks for the solutions. I think the decorator idea is what I'm look for:-) Note that the unittest module now supports the `skip' and `expectedFailure' decorators, which seem to describe some of the solutions here. See http://docs.python.org/3.1/library/unittest.html#skipping-tests-and-expected-failures -- -David -- http://mail.python.org/mailman/listinfo/python-list
Re: what is it, that I don't understand about python and lazy evaluation?
2009/8/13 Erik Bernoth erik.bern...@googlemail.com: after 14 it is not nessesary to evaluate evens() any further. How does Python know this? I.e. how does it know that evens() will always yield things in ascending order? For example, I could write an iterator like this: def my_iter(): for i in [0,2,4,6,8,10,12,14,16,18,1,3,5]: yield i Now, imagine I do [i for i in my_iter() if i 15]. If you quit iterating after `i' becomes 16, you'll miss the valid numbers 1, 3, 5 at the end of the list! -- -David -- http://mail.python.org/mailman/listinfo/python-list
[issue6641] strptime doesn't support %z format ?
David House dmho...@gmail.com added the comment: From the documentation from time.strptime() (which acts the same as datetime.strptime()): Only the directives specified in the documentation [of time.strftime()] are supported. Because strftime() is implemented per platform it can sometimes offer more directives than those listed. But strptime() is independent of any platform and thus does not necessarily support all directives available that are not documented as supported. So I think invalid. -- nosy: +dmhouse ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6641 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
try - except - else - except?
Hi all, I'm looking for some structure advice. I'm writing something that currently looks like the following: try: short amount of code that may raise a KeyError except KeyError: error handler else: nontrivial amount of code This is working fine. However, I now want to add a call to a function in the `else' part that may raise an exception, say a ValueError. So I was hoping to do something like the following: try: short amount of code that may raise a KeyError except KeyError: error handler else: nontrivial amount of code except ValueError: error handler However, this isn't allowed in Python. An obvious way round this is to move the `else' clause into the `try', i.e., try: short amount of code that may raise a KeyError nontrivial amount of code except KeyError: error handler except ValueError: error handler However, I am loath to do this, for two reasons: (i) if I modify the nontrivial amount of code block at some point in the future so that it may raise a KeyError, I have to somehow tell this exception from the one that may be generated from the short amount of code that may raise a KeyError line. (ii) it moves the error handler for the short amount of code that may raise a KeyError bit miles away from the line that might generate the error, making it unclear which code the KeyError error handler is an error handler for. What would be the best way to structure this? -- -David -- http://mail.python.org/mailman/listinfo/python-list
Re: try - except - else - except?
2009/7/6 Python pyt...@rgbaz.eu: as far as I know try has no 'else' It does: http://docs.python.org/reference/compound_stmts.html#the-try-statement it's 'finally' There is a `finally', too, but they are semantically different. See the above link. -- -David -- http://mail.python.org/mailman/listinfo/python-list
