I have a dict like this:
{1: ['1,2,3', '4,5,6', '7,8']}
the dict can be variable in the number of list items but always 1 dict item. How do I merge it to
{1: ['1,2,3,4,5,6,7,8']}
?
Thanks
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Are you sure you need a list as the value? It will always contain only one element.Mark Byers– Mark Byers2011-10-21 14:06:20 +00:00Commented Oct 21, 2011 at 14:06
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@MarkByers what options are there?khany– khany2011-10-21 14:36:12 +00:00Commented Oct 21, 2011 at 14:36
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2 Answers
>>> d
{1: ['1,2,3', '4,5,6', '7,8'], 2: ['9,10', '11']}
>>> for k,v in d.iteritems():
... d[k] = [",".join(v)]
...
>>> d
{1: ['1,2,3,4,5,6,7,8'], 2: ['9,10,11']}
1 Comment
Shawn Chin
This works just as well with one dict item. The example merely showing that it can also handle multiple items if needed. BTW, wouldn't a simple variable suffice if you have only one item?
in your case, you just need concat a string.
But if you want to merge the collection, try this:
a = [1, 2, 3]
b = [3, 4, 5]
a.extend(b)
print a
[1, 2, 3, 3, 4, 5]
1 Comment
khany
Not what I was after as the number of collections can vary and your code expects a fixed number - however, I like the simplicity and will keep it for future code.