One solution to a question

Define a procedure histogram() that takes a list of integers and prints a histogram to the screen. For example, histogram([4, 9, 7]) should print the following:

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class Solution:
    def hist1(self,vector):
         a1=[0]*len(vector)
         for i in range(len(vector)):
             a1[i]='*'*vector[i]
         for j in range(len(a1)):
             print(a1[j])



kk=Solution()
if __name__=="__main__":

    kk.hist1([2,5,8])

results: