Two dimensional array giving incorrect result in python

Question

I have this code to create 2d array by loop

result = dict()
final = dict()

with open(self.json_file , 'w') as outfile:
    for entry in sections_list:
        path_items = raw_config.items(entry)
        for key,path in path_items:
            final[key]=path
            result[entry] = final
    json.dump(result, outfile)

but in result i got all key, path for each entry ! What to do ???

That is what you are assigning, you assign final[key]=path and then result[entry] = final what do you expect to happen? You are also creating two dicts not a 2d array. — Padraic Cunningham
– Padraic Cunningham, Commented Jul 23, 2014 at 11:31
You only have one final dict, and you use it for everything. Also, you probably ought to read up on Python's data structures, because dicts aren't arrays. — user2357112
– user2357112, Commented Jul 23, 2014 at 11:32

WKPlus · Accepted Answer · 2014-07-23 11:36:30Z

2

From your code, I think you want a dict contains dict elements, you can do it like this:

result = dict()
with open(self.json_file , 'w') as outfile:
    for entry in sections_list:
        path_items = raw_config.items(entry)
        result[entry] = dict()
        for key,path in path_items:
            result[entry][key] = path

    json.dump(result, outfile)

If path_items is a list/tuple of list/tuple which contains two elements, you can make the code simpler like this:

result = dict()
with open(self.json_file , 'w') as outfile:
    for entry in sections_list:
        path_items = raw_config.items(entry)
        result[entry] = dict(path_items)

    json.dump(result, outfile)

answered Jul 23, 2014 at 11:36

WKPlus

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