def __init__(self, cov, source_filename):
        self.cov = cov
        self.source_filename = source_filename
        (filename_again, statements, excluded, missing,
         missing_str) = cov.analysis2(source_filename)
        self.covered = len(excluded) - len(missing) - len(statements)
        self.total = len(statements) - len(excluded)
        self._missing = set(missing)
        self._statements = set(statements)
        self._excluded = set(excluded)
dataset/ETHPy150Open dnanexus/dx-toolkit/src/python/test/coveragereport.py/CoverageCoverageNode.__init__/swapped operands of `-`