Mike P wrote:
Hi All,I have two dictionaries e.g dict1 = {123:3,234:5,456:3} dict2 = {123:4,157:2,234:5,456:3,567:2} I want to merge these two dictionaries together so i have a resultant dictionary of: dict3 = {123:[4,3],157:[2,0],234:[5,5],456:[3,3],567:[2,0]} As later on i want to write a csv file that would have the form id var1 var2 123 4 3 157 2 0 i looks like the dict.update looks almost there but i can't get it to work properly, can anyone offer any advise?
result=dict((key,(dict1.get(key,None),
dict2.get(key,None)))
for key in set(dict1.keys()+dict2.keys())
)
(untested)
should provide you with a resulting dictonary with tuples
where [0] is var1 and [1] is var2, None for values not
in one of the dictionaries (you can put in 0 if you prefer).
You can use it like so to generate your output:
allitems=result.items()
allitems.sort() # sort based on keys as first tuple element
for (key,(var1,var2)) in allitems:
print key,var1,var2
HTH
Tino
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