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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 run(self):
 """Run analysis on a single file."""

        pydocstyle.Error.explain = self.options['explain']
        filename, source = load_file(self.filename)
        for error in pydocstyle.PEP257Checker().check_source(source, filename):
            if not hasattr(error, 'code') or ignore(error.code):
                continue
            lineno = error.line
            offset = 0  # Column number starting from 0.
            explanation = error.explanation if pydocstyle.Error.explain else ''
            text = '{0} {1}{2}'.format(error.code, error.message.split(': ', 1)[1], explanation)
            yield lineno, offset, text, Main