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

for i,j in dictionary .items():
    if i=='C1':
        c=[]
        for k in j:
            j=k+10
            c.append(j)
            dictionary .update({i:c})