我们从Python开源项目中，提取了以下23个代码示例，用于说明如何使用token.DOUBLESTAR。
def power(self, nodelist): # power: atom trailer* ('**' factor)* node = self.com_node(nodelist[0]) for i in range(1, len(nodelist)): elt = nodelist[i] if elt[0] == token.DOUBLESTAR: return Power([node, self.com_node(nodelist[i+1])], lineno=elt[2]) node = self.com_apply_trailer(node, elt) return node
def com_call_function(self, primaryNode, nodelist): if nodelist[0] == token.RPAR: return CallFunc(primaryNode, [], lineno=extractLineNo(nodelist)) args = [] kw = 0 star_node = dstar_node = None len_nodelist = len(nodelist) i = 1 while i < len_nodelist: node = nodelist[i] if node[0]==token.STAR: if star_node is not None: raise SyntaxError, 'already have the varargs indentifier' star_node = self.com_node(nodelist[i+1]) i = i + 3 continue elif node[0]==token.DOUBLESTAR: if dstar_node is not None: raise SyntaxError, 'already have the kwargs indentifier' dstar_node = self.com_node(nodelist[i+1]) i = i + 3 continue # positional or named parameters kw, result = self.com_argument(node, kw, star_node) if len_nodelist != 2 and isinstance(result, GenExpr) \ and len(node) == 3 and node[2][0] == symbol.comp_for: # allow f(x for x in y), but reject f(x for x in y, 1) # should use f((x for x in y), 1) instead of f(x for x in y, 1) raise SyntaxError, 'generator expression needs parenthesis' args.append(result) i = i + 2 return CallFunc(primaryNode, args, star_node, dstar_node, lineno=extractLineNo(nodelist))
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
def com_assign(self, node, assigning): # return a node suitable for use as an "lvalue" # loop to avoid trivial recursion while 1: t = node[0] if t in (symbol.exprlist, symbol.testlist, symbol.testlist_safe, symbol.testlist_comp): if len(node) > 2: return self.com_assign_tuple(node, assigning) node = node[1] elif t in _assign_types: if len(node) > 2: raise SyntaxError, "can't assign to operator" node = node[1] elif t == symbol.power: if node[1][0] != symbol.atom: raise SyntaxError, "can't assign to operator" if len(node) > 2: primary = self.com_node(node[1]) for i in range(2, len(node)-1): ch = node[i] if ch[0] == token.DOUBLESTAR: raise SyntaxError, "can't assign to operator" primary = self.com_apply_trailer(primary, ch) return self.com_assign_trailer(primary, node[-1], assigning) node = node[1] elif t == symbol.atom: t = node[1][0] if t == token.LPAR: node = node[2] if node[0] == token.RPAR: raise SyntaxError, "can't assign to ()" elif t == token.LSQB: node = node[2] if node[0] == token.RSQB: raise SyntaxError, "can't assign to []" return self.com_assign_list(node, assigning) elif t == token.NAME: return self.com_assign_name(node[1], assigning) else: raise SyntaxError, "can't assign to literal" else: raise SyntaxError, "bad assignment (%s)" % t
def test_exact_type(self): self.assertExactTypeEqual('()', token.LPAR, token.RPAR) self.assertExactTypeEqual('[]', token.LSQB, token.RSQB) self.assertExactTypeEqual(':', token.COLON) self.assertExactTypeEqual(',', token.COMMA) self.assertExactTypeEqual(';', token.SEMI) self.assertExactTypeEqual('+', token.PLUS) self.assertExactTypeEqual('-', token.MINUS) self.assertExactTypeEqual('*', token.STAR) self.assertExactTypeEqual('/', token.SLASH) self.assertExactTypeEqual('|', token.VBAR) self.assertExactTypeEqual('&', token.AMPER) self.assertExactTypeEqual('<', token.LESS) self.assertExactTypeEqual('>', token.GREATER) self.assertExactTypeEqual('=', token.EQUAL) self.assertExactTypeEqual('.', token.DOT) self.assertExactTypeEqual('%', token.PERCENT) self.assertExactTypeEqual('{}', token.LBRACE, token.RBRACE) self.assertExactTypeEqual('==', token.EQEQUAL) self.assertExactTypeEqual('!=', token.NOTEQUAL) self.assertExactTypeEqual('<=', token.LESSEQUAL) self.assertExactTypeEqual('>=', token.GREATEREQUAL) self.assertExactTypeEqual('~', token.TILDE) self.assertExactTypeEqual('^', token.CIRCUMFLEX) self.assertExactTypeEqual('<<', token.LEFTSHIFT) self.assertExactTypeEqual('>>', token.RIGHTSHIFT) self.assertExactTypeEqual('**', token.DOUBLESTAR) self.assertExactTypeEqual('+=', token.PLUSEQUAL) self.assertExactTypeEqual('-=', token.MINEQUAL) self.assertExactTypeEqual('*=', token.STAREQUAL) self.assertExactTypeEqual('/=', token.SLASHEQUAL) self.assertExactTypeEqual('%=', token.PERCENTEQUAL) self.assertExactTypeEqual('&=', token.AMPEREQUAL) self.assertExactTypeEqual('|=', token.VBAREQUAL) self.assertExactTypeEqual('^=', token.CIRCUMFLEXEQUAL) self.assertExactTypeEqual('^=', token.CIRCUMFLEXEQUAL) self.assertExactTypeEqual('<<=', token.LEFTSHIFTEQUAL) self.assertExactTypeEqual('>>=', token.RIGHTSHIFTEQUAL) self.assertExactTypeEqual('**=', token.DOUBLESTAREQUAL) self.assertExactTypeEqual('//', token.DOUBLESLASH) self.assertExactTypeEqual('//=', token.DOUBLESLASHEQUAL) self.assertExactTypeEqual('@', token.AT) self.assertExactTypeEqual('a**2+b**2==c**2', NAME, token.DOUBLESTAR, NUMBER, token.PLUS, NAME, token.DOUBLESTAR, NUMBER, token.EQEQUAL, NAME, token.DOUBLESTAR, NUMBER) self.assertExactTypeEqual('{1, 2, 3}', token.LBRACE, token.NUMBER, token.COMMA, token.NUMBER, token.COMMA, token.NUMBER, token.RBRACE) self.assertExactTypeEqual('^(x & 0x1)', token.CIRCUMFLEX, token.LPAR, token.NAME, token.AMPER, token.NUMBER, token.RPAR)
