12_01_callable.py

# coding: utf-8
from decimal import Decimal

class QueryFile():
    def __init__(self, filename):
        self._file = open(filename, "r")

    def __iter__(self):
        return self

    def __next__(self):
        data = self._file.readline().split(';')
        if not data or len(data) == 1:
            self._file.close()
            raise StopIteration

        returned_el = []
        for position in self.positions:
            if len(data) >= position:
                returned_el.append(data[position])

        return returned_el

    def __call__(self, *args):
        self.positions = args
        return self


query = QueryFile('data/data/ExecucaoFinanceira.csv')

for data in query(5, 7):
    print("Execucao no valor de {} assinada {}".format(
        data[0], data[1]))