Comparing/combining two dictionaries

Question

I have two dictionaries with key-value pairs as follows:

dict-1  ch:23, 100
        ch:24, 95

dict-2  Ch:23, 98
        ch:25, 100

Not all key

Answer 1

Note If you are using a dictionary (Unless OrderedDict), the order would not be preserved, so the final order of your result would not be same as you depicted in your example

Coming back to your example If

>>> d1={'ch:23': 100, 'ch:24': 95}
>>> d2={'ch:23': 98 ,'ch:25': 100}

You can try this

>>> d3=collections.defaultdict(list)
>>> for k,e in d1.items()+d2.items():
    d3[k].append(e)

If you want to preserve the Order, you need to create the original dictionary as an ordered dict in the first instance

Then you can do as

>>> d1
OrderedDict([('ch:23', 100), ('ch:24', 95)])
>>> d2
OrderedDict([('ch:23', 98), ('ch:25', 100)])
>>> d3=collections.OrderedDict()
>>> for k,e in d1.items()+d2.items():
    d3.setdefault(k,[]).append(e)   
>>> d3
OrderedDict([('ch:23', [100, 98]), ('ch:24', [95]), ('ch:25', [100])])
>>>