modulegraph.py 文件源码

def run_script(self, pathname, caller=None):
        """
        Create a node by path (not module name).  It is expected to be a Python
        source file, and will be scanned for dependencies.
        """
        self.msg(2, "run_script", pathname)

        pathname = os.path.realpath(pathname)
        m = self.findNode(pathname)
        if m is not None:
            return m

        if sys.version_info[0] != 2:
            with open(pathname, 'rb') as fp:
                encoding = util.guess_encoding(fp)

            with open(pathname, _READ_MODE, encoding=encoding) as fp:
                contents = fp.read() + '\n'
            if contents.startswith(BOM):
                # Ignore BOM at start of input
                contents = contents[1:]

        else:
            with open(pathname, _READ_MODE) as fp:
                contents = fp.read() + '\n'

        co_ast = compile(contents, pathname, 'exec', ast.PyCF_ONLY_AST, True)
        co = compile(co_ast, pathname, 'exec', 0, True)
        m = self.createNode(Script, pathname)
        self._updateReference(caller, m, None)
        self._scan_code(m, co, co_ast)
        m.code = co
        if self.replace_paths:
            m.code = self._replace_paths_in_code(m.code)
        return m


    #FIXME: For safety, the "source_module" parameter should default to the
    #root node of the current graph if unpassed. This parameter currently
    #defaults to None, thus disconnected modules imported in this manner (e.g.,
    #hidden imports imported by depend.analysis.initialize_modgraph()).