我们从Python开源项目中，提取了以下20个代码示例，用于说明如何使用symbol.varargslist()。
def funcdef(self, nodelist): # -6 -5 -4 -3 -2 -1 # funcdef: [decorators] 'def' NAME parameters ':' suite # parameters: '(' [varargslist] ')' if len(nodelist) == 6: assert nodelist[0][0] == symbol.decorators decorators = self.decorators(nodelist[0][1:]) else: assert len(nodelist) == 5 decorators = None lineno = nodelist[-4][2] name = nodelist[-4][1] args = nodelist[-3][2] if args[0] == symbol.varargslist: names, defaults, flags = self.com_arglist(args[1:]) else: names = defaults = () flags = 0 doc = self.get_docstring(nodelist[-1]) # code for function code = self.com_node(nodelist[-1]) if doc is not None: assert isinstance(code, Stmt) assert isinstance(code.nodes[0], Discard) del code.nodes[0] return Function(decorators, name, names, defaults, flags, doc, code, lineno=lineno)
def lambdef(self, nodelist): # lambdef: 'lambda' [varargslist] ':' test if nodelist[2][0] == symbol.varargslist: names, defaults, flags = self.com_arglist(nodelist[2][1:]) else: names = defaults = () flags = 0 # code for lambda code = self.com_node(nodelist[-1]) return Lambda(names, defaults, flags, code, lineno=nodelist[1][2])
def varargslist(self, nodelist): raise WalkerError
def com_arglist(self, nodelist): # varargslist: # (fpdef ['=' test] ',')* ('*' NAME [',' '**' NAME] | '**' NAME) # | fpdef ['=' test] (',' fpdef ['=' test])* [','] # fpdef: NAME | '(' fplist ')' # fplist: fpdef (',' fpdef)* [','] names = [] defaults = [] flags = 0 i = 0 while i < len(nodelist): node = nodelist[i] if node[0] == token.STAR or node[0] == token.DOUBLESTAR: if node[0] == token.STAR: node = nodelist[i+1] if node[0] == token.NAME: names.append(node[1]) flags = flags | CO_VARARGS i = i + 3 if i < len(nodelist): # should be DOUBLESTAR t = nodelist[i][0] if t == token.DOUBLESTAR: node = nodelist[i+1] else: raise ValueError, "unexpected token: %s" % t names.append(node[1]) flags = flags | CO_VARKEYWORDS break # fpdef: NAME | '(' fplist ')' names.append(self.com_fpdef(node)) i = i + 1 if i < len(nodelist) and nodelist[i][0] == token.EQUAL: defaults.append(self.com_node(nodelist[i + 1])) i = i + 2 elif len(defaults): # we have already seen an argument with default, but here # came one without raise SyntaxError, "non-default argument follows default argument" # skip the comma i = i + 1 return names, defaults, flags
