dumper_series.py
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			import sys
			from abc import ABC, abstractmethod


			class DumperSeries(ABC):

			def __init__(self, series):
			self.series = series
			self.precision = 4
			self._file = sys.stdout
			self.outfile = ''

			def __del__(self):
			pass

			@abstractmethod
			def dump(self):
			pass

			def setPrecision(self, precision):
			self.precision = precision

			def setOutFile(self, outfile):
			self.outfile = outfile
			if outfile == '':
			return

			self._file = open(outfile, 'w')

			def __str__(self):
			return self.dump()

R9316/exercises/week5/series/sources-solution/dumper_series.py2902b12152f5master