Print nested structures

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November 29th, 2012, 01:59 PM

green_leaf

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Print nested structures

Hello guys,
I have a quick question.
Why does the code below

Code:

structOutput = {'Contribution_from_sale': 'some val', 'Marginal_in_AIR': 'some val', 'Marginal_bad_debt': 'some val', 'Total_financial_effect': 'some val'}
listProducts = {'Product_1':structOutput, 'Product_2':structOutput, 'Product_3':structOutput}
listClients = {'Client_1':listProducts, 'Client_2':listProducts, 'Client_3':listProducts}
 

for names,lists in listClients.items():
    print names
    for prods,vals in listClients[names].items():
        print prods
        print listClients[names][prods]

not print the structures in order, but instead

Code:

Client_1
Product_1
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_3
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_2
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Client_2
Product_1
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_3
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_2
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Client_3
Product_1
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_3
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}
Product_2
{'Total_financial_effect': 'some val', 'Contribution_from_sale': 'some val', 'Marginal_bad_debt': 'some val', 'Marginal_in_AIR': 'some val'}

November 29th, 2012, 02:26 PM

rrashkin

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because dictionaries are not ordered (they're mapped). See the library reference, Mapping Types

Quote:

Keys and values are listed in an arbitrary order which is non-random, varies across Python implementations, and depends on the dictionary’s history of insertions and deletions.

November 29th, 2012, 02:48 PM

green_leaf

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I see...
So then printing them in the order i have writen them can not be done with this kind of structure from what i understand right?

November 29th, 2012, 03:04 PM

rrashkin

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not without a bit of forethought in the structure of the keys (so they might be sorted).

November 29th, 2012, 03:12 PM

AndrewSW

JavaScript is not spelt java

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One way is:

Code:

for key in sorted(a_dict.keys()):
    print(a_dict[key])

November 29th, 2012, 03:15 PM

green_leaf

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I think i am starting to get it thanks guys...

Print nested structures

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