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I have the dataset called gd, taken from an xls, an example:

 DATA_CRIA   FROTA
 1971        2
 1972        19
 1973        19

This dataset has several entries with the pattern listed above, I would like to create a dictionary with the values of each years added to previous ones, for example:

{1971:2, 1972:21, 1973:40}

For this I did this:

dic_ano = {}
for ano in anos:
    dic_ano.update({ano:0})

for i in range(len(gd)):
    for ano in anos:
        if gd.iloc[i]['DATA_CRIA'] == ano:
            dic_ano[ano] = dic_ano[ano]+1

But the values are not coming out with the right count, what should I do?

python

asked by anonymous 13.08.2018 / 21:56

1 answer

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score 0 · Accepted Answer

#Pego os anos
anos = gd['DATA_CRIA'].tolist()
#OU anos = gd['DATA_CRIA'].values

#ordeno os anos por precaução
anos.sort()

dic_ano = {}
soma_frota = 0
for ano in anos:
    #filtro o gd onde DATA_CRIA é igual ao ano, pego o valor da coluna FROTA
    soma_frota += gd[gd['DATA_CRIA'] == ano]['FROTA'].values[0]
    dic_ano.update({ano:soma_frota})

>>> print(dic_ano)
{1971: 2, 1972: 21, 1973: 40}