Python Dictionary contains List as Value - How to update?

Question

I have a dictionary which has value as a list.

dictionary = { 
               \'C1\' : [10,20,30] 
               \'C2\' : [20,30,40]
             }
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Answer 1

>>> dictionary = {'C1' : [10,20,30],'C2' : [20,30,40]}
>>> dictionary['C1'] = [x+1 for x in dictionary['C1']]
>>> dictionary
{'C2': [20, 30, 40], 'C1': [11, 21, 31]}