code.py 文件源码

def getsource(self, astcache=None):
        """ return failing source code. """
        # we use the passed in astcache to not reparse asttrees
        # within exception info printing
        from py._code.source import getstatementrange_ast
        source = self.frame.code.fullsource
        if source is None:
            return None
        key = astnode = None
        if astcache is not None:
            key = self.frame.code.path
            if key is not None:
                astnode = astcache.get(key, None)
        start = self.getfirstlinesource()
        try:
            astnode, _, end = getstatementrange_ast(self.lineno, source,
                                                    astnode=astnode)
        except SyntaxError:
            end = self.lineno + 1
        else:
            if key is not None:
                astcache[key] = astnode
        return source[start:end]