On Thu, Sep 8, 2011 at 10:48 AM, Joel Goldstick <joel.goldst...@gmail.com>wrote:
> > On Thu, Sep 8, 2011 at 10:36 AM, Andre Engels <andreeng...@gmail.com>wrote: > >> On Thu, Sep 8, 2011 at 4:16 PM, lina <lina.lastn...@gmail.com> wrote: >> >>> On Thu, Sep 8, 2011 at 9:59 PM, Alan Gauld <alan.ga...@btinternet.com> >>> wrote: >>> > On 08/09/11 14:02, lina wrote: >>> >> >>> >> Hi, >>> >> >>> >> I failed to understand the "collpase" meaning in a string. >>> >> >>> >> can someone give me a simple example? >>> > >>> > Can you give us some context? >>> > Its not a method of a string object so far as I can tell? >>> > Where did you read about it? >>> >>> >From "dive into python", >>> >>> http://diveintopython.org/ >>> >>> one example: >>> >>> def info(object, spacing=10, collapse=1): >>> """Print methods and docs strings. >>> >>> Take modules, class, list, dictionary, or strong.""" >>> methodList = [e for e in dir(object) if callable(getattr(object, e))] >>> processFunc = collapse and (lambda s: " ".join(s.split())) or (lambda >>> s: s) >>> print "\n".join(["%s %s" % >>> (method.ljust(spacing), >>> processFunc(str(getattr(object, method).__doc__))) >>> for method in methodList]) >>> >>> if __name__ == "__main__": >>> print info.__doc__ >>> >>> I felt so hard to understand the collapse, >>> >>> Please don't discourage me telling me it's an old book, >>> To me I started reading till 42 pages. let me finish it. >>> >>> I used to study python on and off, >>> sometimes give a whole week, but due to not using it, >>> so >>> it's frustrating that when I really needed it, I barely could complete >>> one. >>> >> >> Reading this, it seems that 'collapse' is a variable defined somewhere >> else in the code. >> >> -- >> André Engels, andreeng...@gmail.com >> >> >> _______________________________________________ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> http://mail.python.org/mailman/listinfo/tutor >> >> collapse is a function that Mark must have described earlier in the > chapter you are working on. Are you using the online version? which chapter > > I spoke too soon. collapse is a boolean variable that you set if you want > to have the code in the lamda function collapse the text. If it is False > then the statement returns false instead of whatever is going on in the > Lambda > -- Joel Goldstick
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