Re: what's the use of __repr__?when shall I use it?
__repr__ should return something that when eval'ed yields an identical
object (if possible). essentially it should represent the programmer/debug
view of the object.
__str__ should mostly return a highly user-friendly string (note: str(obj)
will use __repr__ if __str__ doesn't exist)
you might also be interested in this thread covering the same topic:
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/d10731049459726f/2a8f62f478057abd?q=python+__repr__+__str__+difference&rnum=6#2a8f62f478057abd
thanks,
Vikram
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Re: dictionary: sorting the values preserving the order
hi,
assuming your key-value relationship is one-to-one then as a simple first
pass you can simply initialize d1={} and for i in d.keys(): d1[d[i]] = i
and pass d1 to your sortedDictValue3 function, no?
thanks,
Vikram
On 31 Mar 2005, Rakesh wrote:
> Hi,
> For a particular problem of mine, I want to sort pairs
> by its value.
>
> Eg:
>
> Input:
>
> A, 4
> B, 5
> C, 1
> D, 2
> E, 3
>
> I would like the output to be:
>
> C
> D
> E
> A
> B
>
> i.e. I would like to get the keys in the sorted order of values.
>
> I did google around a little bit. One solution to a similar problem
> suggested is:
>
> # Courtesy:
> http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
> def sortedDictValues3(adict):
> keys = adict.keys()
> keys.sort()
> return map(adict.get, keys)
>
> This gets a list sorted by the keys. How would I get a revised
> dictionary
> sorted by its values.
>
>
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Re: __init__ method and raising exceptions
> I can't use 'break' or 'continue' in a class method, nor can I return a > boolean value from __init__() to check for errors within the for-loop. > How would I be able to stop the current iteration and continue with the > next after reporting an error? maybe i don't fully understand your qn but why don't you let __init__ of your class raise an exception and then catch it in the outer for loop and continue. something like: for i in ... try: foo() except: continue Vikram -- http://mail.python.org/mailman/listinfo/python-list
Re: newbie - Does IDLE care about sitecustomize.py?
Could you figure this out? On Wednesday, November 16, 2005 10:37:09 PM UTC+8, bobu...@yahoo.com wrote: > I have the following test script in the file customize.py > > # C:\Python24\Lib\site-packages\sitecustomize.py > print "test text from sitecustomize" > > If start Python from command prompt I get > > C:\Python24>python > test in sitecustomize > Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] > on win32 > Type "help", "copyright", "credits" or "license" for more information. > > which shows that sitecustomize.py works > > > Now if I start IDLE I only get > > IDLE 1.1.1 > >>> > > which shows that that IDLE doesn't care about sitecustomize.py > > Am I missing something or how do you customize if you are using IDLE? -- https://mail.python.org/mailman/listinfo/python-list
autocomplete and printing
Q1. I want to access a database and just by pressing the first alphabet will showup a dropdown list of all the words starting from that alphabet how can I do that ? ( I know how to access the database but the further problem is unsolved hence) Q2. How can I print a document for example bill or prescription through a printer or network printer (both) using python ? Thank -- http://mail.python.org/mailman/listinfo/python-list
header intact
__ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://mail.python.org/mailman/listinfo/python-list
font change
Q1. I want to change the font of the menu . I want to write the menu items like "File" in my native language.I was successful writing the text in the window in my font. But I am not able to write the menu items in same font. In fact I am not able to find how to change the font of the menu. I am using wx module of wxPython. Q2. A white window is seen when i execute the program it says wxPython:stdout/stderr what is that ? and how to get rid of it ? Thanks in advance. -- Regrads , Vikram Moule -- http://mail.python.org/mailman/listinfo/python-list
