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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_file(self, infile):
 """Given an input file read its contents, strip whitespace from the beginning and end of each line and return a list of the preprocessed lines read. :param infile: file that contains the data to be read :return: list of the read lines with stripped whitespace """

        try:
            encoding = self._encoding if self._encoding else None
            mode = 'r' if self._encoding else 'rU'
            with codecs.open(infile.name, mode, encoding=encoding) as f:
                lines = f.readlines()
        except AttributeError:
            lines = infile.readlines()
        lines = [line.strip() for line in lines]
        return lines