parser.py 文件源码

def __init__(self, text, code=None, filename=None):
        self.text = text
        if code:
            self.code = code
        else:
            try:
                self.code = compile_unicode(text, filename, "exec")
            except SyntaxError as synerr:
                raise NotPython(
                    u"Couldn't parse '%s' as Python source: '%s' at line %d" % (
                        filename, synerr.msg, synerr.lineno
                    )
                )

        # Alternative Python implementations don't always provide all the
        # attributes on code objects that we need to do the analysis.
        for attr in ['co_lnotab', 'co_firstlineno', 'co_consts', 'co_code']:
            if not hasattr(self.code, attr):
                raise CoverageException(
                    "This implementation of Python doesn't support code analysis.\n"
                    "Run coverage.py under CPython for this command."
                )