One line for loop with object modification

Question

I have an array of objects where each object has a search_order attribute. I was to go over the array and increase that attribute by 1 for all objects This is the easy way:

res = []
for r in array:
    r.search_order+=1
    res.append(r)
return iter(res)

Is there a one line for loop that can accomplish this?

return (r.search_order+=1 for r in array)

Doest seem to work unfortunately.

barunsthakur · Accepted Answer · 2015-06-21 11:12:55Z

1

This may not be one line but this does the job correctly

def incr_search_order(x):
    x.search_order += 1
    return x

retrun map(incr_search_order, array)
<or>
return [incr_search_order(x) for x in array]

edited Jun 21, 2015 at 11:12

answered Jun 21, 2015 at 10:19

barunsthakur

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Comments

Kasravnd · Accepted Answer · 2015-06-21 10:07:20Z

0

You can not use an assignment within generator expression or list comprehension (it will raise SyntaxError).

Instead add the attribute with 1 and reassign the result :

old_array=(r.search_order+1 for r in array)

answered Jun 21, 2015 at 10:07

Kasravnd

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