import numpy as np

class Atransobj:
    def __init__(self,T):
        self.T=T

    def numbertran (self,T):
        lengthbuy=len(T)
        items=[T[a][0] for a in range(0,lengthbuy)]
        itemset=set([T[a][0] for a in range(0,lengthbuy)]
        leng=len(items)
        itemcount=[]
        for item in itemset:
            lists=[item==items[j] for j in range(0,leng)]
            tepitemcount=[item, sum(lists)]
            itemcount.append(tepitemcount)
        return itemcount

    def meanvalue (self, T):
        lengthbuy=len(T)
        values=[T[a][1] for a in range(0,lengthbuy)]
        items=[T[a][0] for a in range(0,lengthbuy)])
        itemset=set([T[a][0] for a in range(0,lengthbuy)])
        itemmean=[]
        for item in itemset:
            ind=[i for i, x in enumerate(items) if x==item]
            lists=[values[j] for j in ind]
            m=np.array(lists)
            tepitemsum=[item, m.mean()]
            itemmean.append(tepitemsum)
        return itemmean