Help me out with bugs in my list ?

[Christophe Delord]

Hi,

You can use zip to make tuples from a list and check unicity of the tuples
instead of its components.

For example:

-----
def uzip(*Ls):
    """ zip filtering duplicate tuples """
    L = []
    for x in zip(*Ls):      # for each tuple
        if x not in L:      # filter duplicate tuples
            L.append(x)
    return zip(*L)          # returns a list for each item of the tuples

binding_list = ["ls","ls","ls","netscape","netscape","lib","lib"]

to_list = ["ls","lib","ls","netscape","ls","lib","lib"]

new_binding_list, new_to_list = uzip(binding_list, to_list)

print "new_binding_list:", new_binding_list
print "new_to_list     :", new_to_list
-----

new_binding_list: ('ls', 'ls', 'netscape', 'netscape', 'lib')
new_to_list     : ('ls', 'lib', 'netscape', 'ls', 'lib')

-----

Christophe.

On Thu, 7 Nov 2002 20:18:29 -0800 (PST)
Mindy <csshi99 at yahoo.com> wrote:

> Hey, I have two lists like:
> binding_list =
> ["ls","ls","ls","netscape","netscape","lib","lib"]
> 
> to_list =
> ["ls","lib","ls","netscape","ls","lib","lib"]
> 
> I want to get non-duplicated pairs of strings from
> them like
> (binding_list[i],to_list[i]) by eliminating the
> duplicated pairs. For the above two lists, I want to
> get two new lists:
> binding_list = ['ls', 'ls', 'netscape', 'netscape',
> 'lib']
> to_list = ['ls', 'lib', 'netscape', 'ls', 'lib']
> 
> My codes are like the following, but I got the result
> as:
> binding_list = ['ls', 'ls', 'netscape', 'netscape',
> 'lib','lib']
> to_list = ['ls', 'lib', 'netscape', 'ls', 'lib','lib']
> 
> With the last two pairs duplicated. I know I was wrong
> because at the last loop, index1 = 4, index2 =1, even
> though the fifth pair is the same with the fourth
> pair, my codes can't detect this. Could anyone help me
> to get a correct piece of codes? Thanks so much!
> 
> My codes:
> ----------------
> for i in range(1,len(binding_list)):  
>     if (i == len(binding_list)): 
> 	break
> index1 = binding_list.index(binding_list[i])
> index2 = to_list.index(to_list[i])
> if ((index1 >=0)and(index2 >=0)and(index1==index2)):
> 	del binding_list[i]
> 	del to_list[i]
> 
> print binding_list
> print to_list
> 
> 
> 
> =====
> Cheers
> -Mindy
> 
> __________________________________________________
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-- 

(o_   Christophe Delord                   _o)
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