Simple Problem: Getting rid of {}

[dont bother]

Hi,
I have done some string concatenation:

feature_vector= {}
feature_element ={}

#inside a loop

if (v==0):
feature_element =str(1)+"
"+str(index[i])+":"+str(vecto r[i])+" "
print feature_element
else:

feature_element =str(index[i])+":"+str(vecto r[i])+" "


feature_vector= str(feature_ele ment)+str(featu re_vector)
if (v==0):
print feature_vector


when I print feature_vector I get my desired output
but with an extra {} in the end.

Output:

1 22389:0.0291806 958474
1 22389:0.0291806 958474 {}



I fail to understand why this is happening since
feature_element should also have {} in the end, if it
was the case with the variables I declared with like:
syntax{}

How to get rid of this extra {} from my string.

Thanks
Dont




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[Jeroen Wenting]

Re: Simple Problem: Getting rid of {}

> #inside a loop[color=blue]
>
> if (v==0):
> feature_element =str(1)+"
> "+str(index[i])+":"+str(vecto r[i])+" "
> print feature_element
> else:
>[/color]
feature_element is a string here.
[color=blue]
> feature_element =str(index[i])+":"+str(vecto r[i])+" "
>[/color]
same here
[color=blue]
>
> feature_vector= str(feature_ele ment)+str(featu re_vector)
> if (v==0):
> print feature_vector
>[/color]
here feature_vector is made a string you're doing feature_vector = "1
22389:0.0291806 958474" + "{}" which yields the result you get.[color=blue]
>
> when I print feature_vector I get my desired output
> but with an extra {} in the end.
>
> Output:
>
> 1 22389:0.0291806 958474
> 1 22389:0.0291806 958474 {}
>
>
>
> I fail to understand why this is happening since
> feature_element should also have {} in the end, if it
> was the case with the variables I declared with like:
> syntax{}
>
> How to get rid of this extra {} from my string.
>[/color]
feature_vector. add(feature_ele ment)
print " ".join("%s" %x for x in feature_vector)

or something along those lines :)

[Neal Holtz]

Re: Simple Problem: Getting rid of {}

By starting it

feature_vector= ''
feature_element =''

To see why, try this:

fv = {} # this creates an empty dictionary, not a string
print str(fv)
fv =''
print str(fv)

dont bother <dontbotherworl d@yahoo.com> wrote in message news:<mailman.3 30.1079123993.1 9534.python-list@python.org >...[color=blue]
> Hi,
> I have done some string concatenation:
>
> feature_vector= {}
> feature_element ={}
>
> #inside a loop
>
> if (v==0):
> feature_element =str(1)+"
> "+str(index[i])+":"+str(vecto r[i])+" "
> print feature_element
> else:
>
> feature_element =str(index[i])+":"+str(vecto r[i])+" "
>
>
> feature_vector= str(feature_ele ment)+str(featu re_vector)
> if (v==0):
> print feature_vector
>
>
> when I print feature_vector I get my desired output
> but with an extra {} in the end.
>
> Output:
>
> 1 22389:0.0291806 958474
> 1 22389:0.0291806 958474 {}
>
>
>
> I fail to understand why this is happening since
> feature_element should also have {} in the end, if it
> was the case with the variables I declared with like:
> syntax{}
>
> How to get rid of this extra {} from my string.
>
> Thanks
> Dont
>
>
>
>
> _______________ _______________ ____
> Do you Yahoo!?
> Yahoo! Search - Find what you?re looking for faster
> http://search.yahoo.com[/color]