diff --git a/www/src/brython.js b/www/src/brython.js
index e244f2113..9a50a3680 100644
--- a/www/src/brython.js
+++ b/www/src/brython.js
@@ -209,8 +209,8 @@ $B.unicode_bidi_whitespace=[9,10,11,12,13,28,29,30,31,32,133,5760,8192,8193,8194
 ;
 __BRYTHON__.implementation=[3,13,1,'dev',0]
 __BRYTHON__.version_info=[3,13,0,'final',0]
-__BRYTHON__.compiled_date="2024-11-19 08:15:13.160628"
-__BRYTHON__.timestamp=1732000513160
+__BRYTHON__.compiled_date="2024-11-19 08:49:56.602863"
+__BRYTHON__.timestamp=1732002596602
 __BRYTHON__.builtin_module_names=["_ajax","_ast","_base64","_binascii","_io_classes","_json","_jsre","_locale","_multiprocessing","_posixsubprocess","_profile","_random","_sre","_sre_utils","_string","_strptime","_svg","_symtable","_tokenize","_webcomponent","_webworker","_zlib_utils","_zlib_utils1","_zlib_utils_kozh","array","builtins","dis","encoding_cp932","encoding_cp932_v2","hashlib","html_parser","marshal","math","modulefinder","posix","pyexpat","python_re","python_re_new","unicodedata","xml_helpers","xml_parser","xml_parser_backup"]
 ;
 
@@ -6642,11 +6642,12 @@ str.__mod__=function(_self,args){_self=to_string(_self)
 var res=$B.printf_format(_self,'str',args)
 return $B.String(res)}
 str.__mro__=[_b_.object]
-str.__mul__=function(){var $=$B.args("__mul__",2,{self:null,other:null},["self","other"],arguments,{},null,null),_self=to_string($.self)
-if(! $B.$isinstance($.other,_b_.int)){throw _b_.TypeError.$factory(
+str.__mul__=function(self,other){$B.check_nb_args_no_kw('str.__mul__',2,arguments)
+var _self=to_string(self)
+if(! $B.$isinstance(other,_b_.int)){throw _b_.TypeError.$factory(
 "Can't multiply sequence by non-int of type '"+
-$B.class_name($.other)+"'")}
-return _self.repeat($.other < 0 ? 0 :$.other)}
+$B.class_name(other)+"'")}
+return _self.repeat(other < 0 ? 0 :other)}
 str.__ne__=function(_self,other){var eq=str.__eq__(_self,other)
 return eq===_b_.NotImplemented ? eq :! eq}
 str.__new__=function(cls,value){if(cls===undefined){throw _b_.TypeError.$factory("str.__new__(): not enough arguments")}else if(cls===_b_.str){return value}else{return{
@@ -6666,9 +6667,9 @@ if(res.search('"')==-1 && res.search("'")==-1){return "'"+res+"'"}else if(_self.
 var qesc=new RegExp("'","g")
 res="'"+res.replace(qesc,"\\'")+"'"
 return res}
-str.__rmod__=function(){var $=$B.args('__rmod__',2,{self:null,other:null},['self','other'],arguments,{},null,null)
-if(! $B.$isinstance($.other,str)){return _b_.NotImplemented}
-return str.__mod__($.other,$.self)}
+str.__rmod__=function(self,other){$B.check_nb_args_no_kw('str.__rmod__',2,arguments)
+if(! $B.$isinstance(other,str)){return _b_.NotImplemented}
+return str.__mod__(other,self)}
 str.__rmul__=function(_self,other){_self=to_string(_self)
 if($B.$isinstance(other,_b_.int)){other=_b_.int.numerator(other)
 var res=''
@@ -6699,10 +6700,12 @@ if(typeof other !== typeof _self){
     return _self.$brython_value > other.$brython_value}`
 var comps={">":"gt",">=":"ge","<":"lt","<=":"le"}
 for(var op in comps){str[`__${comps[op]}__`]=Function('_self','other',body.replace(/>/gm,op))}
-str.capitalize=function(){var $=$B.args("capitalize",1,{self},["self"],arguments,{},null,null),_self=to_string($.self)
+str.capitalize=function(self){$B.check_nb_args_no_kw('str.capitalize',1,arguments)
+var _self=to_string(self)
 if(_self.length==0){return ""}
 return _self.charAt(0).toUpperCase()+_self.substr(1).toLowerCase()}
-str.casefold=function(){var $=$B.args("casefold",1,{self},["self"],arguments,{},null,null),res="",char,cf,_self=to_string($.self),chars=to_chars(_self)
+str.casefold=function(self){$B.check_nb_args_no_kw('set.remove',2,arguments)
+var res="",char,cf,_self=to_string(self),chars=to_chars(_self)
 for(var i=0,len=chars.length;i < len;i++){char=chars[i]
 cf=$B.unicode_casefold[char]
 if(cf){cf.forEach(function(cp){res+=String.fromCharCode(cp)})}else{res+=char.toLowerCase()}}
@@ -6858,20 +6861,20 @@ value=$B.$getattr(value,ext.substr(1))}else{
 var key=ext.substr(1,ext.length-2)
 if(key.charAt(0).search(/\d/)>-1){key=parseInt(key)}
 value=$B.$getattr(value,"__getitem__")(key)}}
-if(fmt.conv=="a"){value=_b_.ascii(value)}
-else if(fmt.conv=="r"){value=_b_.repr(value)}
-else if(fmt.conv=="s"){value=_b_.str.$factory(value)}
+if(fmt.conv=="a"){value=_b_.ascii(value)}else if(fmt.conv=="r"){value=_b_.repr(value)}else if(fmt.conv=="s"){value=_b_.str.$factory(value)}
 if(value.$is_class ||value.$factory){
 res+=value.__class__.__format__(value,fmt.spec)}else{res+=$B.$getattr(value,"__format__")(fmt.spec)}}
 return res}
-str.format_map=function(){var $=$B.args("format_map",2,{self:null,mapping:null},['self','mapping'],arguments,{},null,null),_self=to_string($.self)
-return str.format(_self,{$nat:'mapping',mapping:$.mapping})}
+str.format_map=function(self,mapping){$B.check_nb_args_no_kw('str.format_map',2,arguments)
+var _self=to_string(self)
+return str.format(_self,{$nat:'mapping',mapping})}
 str.index=function(){
 var res=str.find.apply(null,arguments)
 if(res===-1){throw _b_.ValueError.$factory("substring not found")}
 return res}
-str.isascii=function(){
-var $=$B.args("isascii",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.isascii=function(self){
+$B.check_nb_args_no_kw('str.format_map',1,arguments)
+var _self=to_string(self)
 for(var i=0,len=_self.length;i < len;i++){if(_self.charCodeAt(i)> 127){return false}}
 return true}
 var unicode_categories_contain_character=function(categories,cp){for(var cat of categories){console.log(cat,cp);
@@ -6879,84 +6882,95 @@ if($B.in_unicode_category(cat,cp)){return true}}
 return false}
 var alpha_categories=['Ll','Lu','Lm','Lt','Lo']
 var alnum_categories=['Ll','Lu','Lm','Lt','Lo','Nd']
-str.isalnum=function(){
-var $=$B.args("isalnum",1,{self:null},["self"],arguments,{},null,null)
-var _self=to_string($.self);
+str.isalnum=function(self){
+$B.check_nb_args_no_kw('str.isalnum',2,arguments)
+var _self=to_string(self);
 if(_self.length==0){return false}
 for(var char of _self){if(!unicode_categories_contain_character(alnum_categories,_b_.ord(char))){return false}}
 return true}
-str.isalpha=function(){
-var $=$B.args("isalpha",1,{self:null},["self"],arguments,{},null,null)
-var _self=to_string($.self);
+str.isalpha=function(self){
+$B.check_nb_args_no_kw('str.isalpha',1,arguments)
+var _self=to_string(self);
 if(_self.length==0){return false}
 for(var char of _self){if(!unicode_categories_contain_character(alpha_categories,_b_.ord(char))){return false}}
 return true}
-str.isdecimal=function(){
-var $=$B.args("isdecimal",1,{self:null},["self"],arguments,{},null,null),cp,_self=to_string($.self)
+str.isdecimal=function(self){
+$B.check_nb_args_no_kw('str.isdecimal',2,arguments)
+var cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if(! $B.in_unicode_category('Nd',cp)){return false}}
 return _self.length > 0}
-str.isdigit=function(){
-var $=$B.args("isdigit",1,{self:null},["self"],arguments,{},null,null),cp,_self=to_string($.self)
+str.isdigit=function(self){
+$B.check_nb_args_no_kw('str.isdigit',1,arguments)
+var cp,_self=to_string(self)
 for(var char of _self){if(/\p{Nd}/u.test(char)){continue}
 cp=_b_.ord(char)
 if(! $B.in_unicode_category('No_digits',cp)){return false}}
 return _self.length > 0}
-str.isidentifier=function(){
-var $=$B.args("isidentifier",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.isidentifier=function(self){
+$B.check_nb_args_no_kw('str.isidentifier',1,arguments)
+var _self=to_string(self)
 if(_self.length==0){return false}
 var chars=to_chars(_self)
 if(! $B.is_XID_Start(_b_.ord(chars[0]))){return false}else{for(var char of chars){var cp=_b_.ord(char)
 if(! $B.is_XID_Continue(cp)){return false}}}
 return true}
-str.islower=function(){
-var $=$B.args("islower",1,{self:null},["self"],arguments,{},null,null),has_cased=false,cp,_self=to_string($.self)
+str.islower=function(self){
+$B.check_nb_args_no_kw('str.islower',1,arguments)
+var has_cased=false,cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if($B.in_unicode_category('Ll',cp)){has_cased=true
 continue}else if($B.in_unicode_category('Lu',cp)||
 $B.in_unicode_category('Lt',cp)){return false}}
 return has_cased}
 const numeric_re=/\p{Nd}|\p{Nl}|\p{No}/u
-str.isnumeric=function(){
-var $=$B.args("isnumeric",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.isnumeric=function(self){
+$B.check_nb_args_no_kw('str.isnumeric',1,arguments)
+var _self=to_string(self)
 for(var char of _self){if((! numeric_re.test(char))&&
 ! $B.in_unicode_category('Lo_numeric',_b_.ord(char))){return false}}
 return _self.length > 0}
 var unprintable_re=/\p{Cc}|\p{Cf}|\p{Co}|\p{Cs}|\p{Zl}|\p{Zp}|\p{Zs}/u
-str.isprintable=function(){
-var $=$B.args("isprintable",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.isprintable=function(self){
+$B.check_nb_args_no_kw('str.isprintable',1,arguments)
+var _self=to_string(self)
 for(var char of _self){if(char==' '){continue}
 if(unprintable_re.test(char)){return false}}
 return true}
-str.isspace=function(){
-var $=$B.args("isspace",1,{self:null},["self"],arguments,{},null,null),cp,_self=to_string($.self)
+str.isspace=function(self){
+$B.check_nb_args_no_kw('str.isspace',1,arguments)
+var cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if(! $B.in_unicode_category('Zs',cp)&&
 $B.unicode_bidi_whitespace.indexOf(cp)==-1){return false}}
 return _self.length > 0}
-str.istitle=function(){
-var $=$B.args("istitle",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.istitle=function(self){
+$B.check_nb_args_no_kw('str.istitle',1,arguments)
+var _self=to_string(self)
 return _self.length > 0 && str.title(_self)==_self}
-str.isupper=function(){
-var $=$B.args("islower",1,{self:null},["self"],arguments,{},null,null),is_upper=false,cp,_self=to_string($.self)
+str.isupper=function(self){
+$B.check_nb_args_no_kw('str.isupper',1,arguments)
+var is_upper=false,cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if($B.in_unicode_category('Lu',cp)){is_upper=true
 continue}else if($B.in_unicode_category('Ll',cp)||
 $B.in_unicode_category('Lt',cp)){return false}}
 return is_upper}
-str.join=function(){var $=$B.args("join",2,{self:null,iterable:null},["self","iterable"],arguments,{},null,null),_self=to_string($.self)
-var iterable=_b_.iter($.iterable),res=[],count=0
+str.join=function(self,iterable){$B.check_nb_args_no_kw('str.join',2,arguments)
+var _self=to_string(self)
+iterable=_b_.iter(iterable)
+var res=[],count=0
 while(1){try{var obj2=_b_.next(iterable)
 if(! $B.$isinstance(obj2,str)){throw _b_.TypeError.$factory("sequence item "+count+
 ": expected str instance, "+$B.class_name(obj2)+
 " found")}
-res.push(obj2)}catch(err){if($B.$isinstance(err,_b_.StopIteration)){break}
-else{throw err}}}
+res.push(obj2)}catch(err){if($B.$isinstance(err,_b_.StopIteration)){break}else{throw err}}}
 return res.join(_self)}
 str.ljust=function(){var $=$B.args("ljust",3,{self:null,width:null,fillchar:null},["self","width","fillchar"],arguments,{fillchar:" "},null,null),_self=to_string($.self),len=str.__len__(_self);
 if($.width <=len){return _self}
 return _self+$.fillchar.repeat($.width-len)}
-str.lower=function(){var $=$B.args("lower",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.lower=function(self){$B.check_nb_args_no_kw('str.lower',1,arguments)
+var _self=to_string(self)
 return _self.toLowerCase()}
 str.lstrip=function(){var $=$B.args("lstrip",2,{self:null,chars:null},["self","chars"],arguments,{chars:_b_.None},null,null),_self=$.self,chars=$.chars
 if(chars===_b_.None){return _self.trimStart()}
@@ -6991,23 +7005,26 @@ _b_.dict.$setitem(_t,key,value)}
 for(let k in toNone){_b_.dict.$setitem(_t,parseInt(k),_b_.None)}
 return _t}}}
 str.maketrans.$type="staticmethod"
-str.partition=function(){var $=$B.args("partition",2,{self:null,sep:null},["self","sep"],arguments,{},null,null),_self,sep
-if($.sep==""){throw _b_.ValueError.$factory("empty separator")}
-check_str($.sep);
-[_self,sep]=to_string([$.self,$.sep])
+str.partition=function(self,sep){$B.check_nb_args_no_kw('str.partition',2,arguments)
+var _self
+if(sep==""){throw _b_.ValueError.$factory("empty separator")}
+check_str(sep);
+[_self,sep]=to_string([self,sep])
 var chars=to_chars(_self),i=_self.indexOf(sep)
 if(i==-1){return _b_.tuple.$factory([_self,"",""])}
 return _b_.tuple.$factory([chars.slice(0,i).join(''),sep,chars.slice(i+sep.length).join('')])}
-str.removeprefix=function(){var $=$B.args("removeprefix",2,{self:null,prefix:null},["self","prefix"],arguments,{},null,null),_self
-if(!$B.$isinstance($.prefix,str)){throw _b_.ValueError.$factory("prefix should be str, not "+
-`'${$B.class_name($.prefix)}'`)}
-[_self,prefix]=to_string([$.self,$.prefix])
+str.removeprefix=function(self,prefix){$B.check_nb_args_no_kw('str.removeprefix',2,arguments)
+var _self
+if(!$B.$isinstance(prefix,str)){throw _b_.ValueError.$factory("prefix should be str, not "+
+`'${$B.class_name(prefix)}'`)}
+[_self,prefix]=to_string([self,prefix])
 if(str.startswith(_self,prefix)){return _self.substr(prefix.length)}
 return _self.substr(0)}
-str.removesuffix=function(){var $=$B.args("removesuffix",2,{self:null,suffix:null},["self","suffix"],arguments,{},null,null),_self
-if(!$B.$isinstance($.suffix,str)){throw _b_.ValueError.$factory("suffix should be str, not "+
-`'${$B.class_name($.prefix)}'`)}
-[_self,suffix]=to_string([$.self,$.suffix])
+str.removesuffix=function(self,suffix){$B.check_nb_args_no_kw('str.removesuffix',2,arguments)
+var _self
+if(!$B.$isinstance(suffix,str)){throw _b_.ValueError.$factory("suffix should be str, not "+
+`'${$B.class_name(suffix)}'`)}
+[_self,suffix]=to_string([self,suffix])
 if(suffix.length > 0 && str.endswith(_self,suffix)){return _self.substr(0,_self.length-suffix.length)}
 return _self.substr(0)}
 str.replace=function(){
@@ -7054,10 +7071,9 @@ str.rjust=function(){var $=$B.args("rjust",3,{self:null,width:null,fillchar:null
 var len=str.__len__(_self)
 if($.width <=len){return _self}
 return $B.String($.fillchar.repeat($.width-len)+_self)}
-str.rpartition=function(self,sep){var $=$B.args("rpartition",2,{self:null,sep:null},["self","sep"],arguments,{},null,null),_self
-check_str($.sep);
-[_self,sep]=[$.self,$.sep]
-_self=reverse(_self),sep=reverse(sep)
+str.rpartition=function(self,sep){$B.check_nb_args_no_kw('str.rpartition',2,arguments)
+check_str(sep)
+var _self=reverse(self),sep=reverse(sep)
 var items=str.partition(_self,sep).reverse()
 for(var i=0;i < items.length;i++){items[i]=items[i].split("").reverse().join("")}
 return items}
@@ -7127,11 +7143,13 @@ return false}
 str.strip=function(){var $=$B.args("strip",2,{self:null,chars:null},["self","chars"],arguments,{chars:_b_.None},null,null)
 if($.chars===_b_.None){return $.self.trim()}
 return str.rstrip(str.lstrip($.self,$.chars),$.chars)}
-str.swapcase=function(self){var $=$B.args("swapcase",1,{self},["self"],arguments,{},null,null),res="",cp,_self=to_string($.self)
+str.swapcase=function(self){$B.check_nb_args_no_kw('str.swapcase',1,arguments)
+var res="",cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if($B.in_unicode_category('Ll',cp)){res+=char.toUpperCase()}else if($B.in_unicode_category('Lu',cp)){res+=char.toLowerCase()}else{res+=char}}
 return res}
-str.title=function(self){var $=$B.args("title",1,{self},["self"],arguments,{},null,null),state,cp,res="",_self=to_string($.self)
+str.title=function(self){$B.check_nb_args_no_kw('str.title',1,arguments)
+var state,cp,res="",_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 if($B.in_unicode_category('Ll',cp)){if(! state){res+=char.toUpperCase()
 state="word"}else{res+=char}}else if($B.in_unicode_category('Lu',cp)||
@@ -7139,22 +7157,25 @@ $B.in_unicode_category('Lt',cp)){res+=state ? char.toLowerCase():char
 state="word"}else{state=null
 res+=char}}
 return res}
-str.translate=function(){var $=$B.args('translate',2,{self:null,table:null},['self','table'],arguments,{},null,null),table=$.table,res=[],getitem=$B.$getattr(table,"__getitem__"),cp,_self=to_string($.self)
+str.translate=function(self,table){$B.check_nb_args_no_kw('str.translate',2,arguments)
+var res=[],getitem=$B.$getattr(table,"__getitem__"),cp,_self=to_string(self)
 for(var char of _self){cp=_b_.ord(char)
 try{var repl=getitem(cp)
 if(repl !==_b_.None){if(typeof repl=="string"){res.push(repl)}else if(typeof repl=="number"){res.push(String.fromCharCode(repl))}}}catch(err){res.push(char)}}
 return res.join("")}
-str.upper=function(){var $=$B.args("upper",1,{self:null},["self"],arguments,{},null,null),_self=to_string($.self)
+str.upper=function(self){$B.check_nb_args_no_kw('str.upper',1,arguments)
+var _self=to_string(self)
 return _self.toUpperCase()}
-str.zfill=function(){var $=$B.args("zfill",2,{self:null,width:null},["self","width"],arguments,{},null,null),_self=to_string($.self)
+str.zfill=function(self,width){$B.check_nb_args_no_kw('str.zfill',2,arguments)
+var _self=to_string(self)
 var len=str.__len__(_self)
-if($.width <=len){return _self}
+if(width <=len){return _self}
 switch(_self.charAt(0)){case "+":
 case "-":
 return _self.charAt(0)+
-"0".repeat($.width-len)+_self.substr(1)
+"0".repeat(width-len)+_self.substr(1)
 default:
-return "0".repeat($.width-len)+_self}}
+return "0".repeat(width-len)+_self}}
 str.$factory=function(arg,encoding){if(arguments.length==0){return ""}
 if(arg===undefined){return $B.UndefinedType.__str__()}else if(arg===null){return '<Javascript null>'}
 if(encoding !==undefined){
diff --git a/www/src/py_set.js b/www/src/py_set.js
index fee146726..a86da637b 100644
--- a/www/src/py_set.js
+++ b/www/src/py_set.js
@@ -871,7 +871,9 @@ for(var attr in set){
           if(frozenset[attr] == undefined){
               if(typeof set[attr] == "function"){
                   frozenset[attr] = (function(x){
-                      return function(){return set[x].apply(null, arguments)}
+                      return function(){
+                          return set[x].apply(null, arguments)
+                      }
                   })(attr)
               }else{
                   frozenset[attr] = set[attr]
diff --git a/www/src/py_string.js b/www/src/py_string.js
index e3797f4d7..93f7e136a 100644
--- a/www/src/py_string.js
+++ b/www/src/py_string.js
@@ -1113,16 +1113,15 @@ str.__mod__ = function(_self, args){
 
 str.__mro__ = [_b_.object]
 
-str.__mul__ = function(){
-    var $ = $B.args("__mul__", 2, {self: null, other: null},
-            ["self", "other"], arguments, {}, null, null),
-        _self = to_string($.self)
-    if(! $B.$isinstance($.other, _b_.int)){
+str.__mul__ = function(self, other){
+    $B.check_nb_args_no_kw('str.__mul__', 2, arguments)
+    var _self = to_string(self)
+    if(! $B.$isinstance(other, _b_.int)){
         throw _b_.TypeError.$factory(
         "Can't multiply sequence by non-int of type '" +
-            $B.class_name($.other) + "'")
+            $B.class_name(other) + "'")
     }
-    return _self.repeat($.other < 0 ? 0 : $.other)
+    return _self.repeat(other < 0 ? 0 : other)
 }
 
 str.__ne__ = function(_self, other){
@@ -1185,13 +1184,12 @@ str.__repr__ = function(_self){
     return res
 }
 
-str.__rmod__ = function(){
-    var $ = $B.args('__rmod__', 2, {self: null, other: null},
-                    ['self', 'other'], arguments, {}, null, null)
-    if(! $B.$isinstance($.other, str)){
+str.__rmod__ = function(self, other){
+    $B.check_nb_args_no_kw('str.__rmod__', 2, arguments)
+    if(! $B.$isinstance(other, str)){
         return _b_.NotImplemented
     }
-    return str.__mod__($.other, $.self)
+    return str.__mod__(other, self)
 }
 
 str.__rmul__ = function(_self, other){
@@ -1267,23 +1265,22 @@ for(var op in comps){
         body.replace(/>/gm, op))
 }
 
-str.capitalize = function(){
-    var $ = $B.args("capitalize", 1, {self}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+str.capitalize = function(self){
+    $B.check_nb_args_no_kw('str.capitalize', 1, arguments)
+
+    var _self = to_string(self)
     if(_self.length == 0){
         return ""
     }
     return _self.charAt(0).toUpperCase() + _self.substr(1).toLowerCase()
 }
 
-str.casefold = function(){
-    var $ = $B.args("casefold", 1, {self}, ["self"],
-            arguments, {}, null, null),
-        res = "",
+str.casefold = function(self){
+    $B.check_nb_args_no_kw('set.remove', 2, arguments)
+    var res = "",
         char,
         cf,
-        _self = to_string($.self),
+        _self = to_string(self),
         chars = to_chars(_self)
     for(var i = 0, len = chars.length; i < len; i++){
         char = chars[i]
@@ -1725,9 +1722,13 @@ str.format = function(){
 
         // If the conversion flag is set, first call a function to convert
         // the value
-        if(fmt.conv == "a"){value = _b_.ascii(value)}
-        else if(fmt.conv == "r"){value = _b_.repr(value)}
-        else if(fmt.conv == "s"){value = _b_.str.$factory(value)}
+        if(fmt.conv == "a"){
+            value = _b_.ascii(value)
+        }else if(fmt.conv == "r"){
+            value = _b_.repr(value)
+        }else if(fmt.conv == "s"){
+            value = _b_.str.$factory(value)
+        }
 
         // Call attribute __format__ to perform the actual formatting
         if(value.$is_class || value.$factory){
@@ -1740,11 +1741,10 @@ str.format = function(){
     return res
 }
 
-str.format_map = function(){
-    var $ = $B.args("format_map", 2, {self: null, mapping: null},
-            ['self', 'mapping'], arguments, {}, null, null),
-        _self = to_string($.self)
-    return str.format(_self, {$nat: 'mapping', mapping: $.mapping})
+str.format_map = function(self, mapping){
+    $B.check_nb_args_no_kw('str.format_map', 2, arguments)
+    var _self = to_string(self)
+    return str.format(_self, {$nat: 'mapping', mapping})
 }
 
 str.index = function(){
@@ -1756,13 +1756,12 @@ str.index = function(){
     return res
 }
 
-str.isascii = function(){
+str.isascii = function(self){
     /* Return true if the string is empty or all characters in the string are
     ASCII, false otherwise. ASCII characters have code points in the range
     U+0000-U+007F. */
-    var $ = $B.args("isascii", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.format_map', 1, arguments)
+    var _self = to_string(self)
     for(var i = 0, len = _self.length; i < len; i++){
         if(_self.charCodeAt(i) > 127){
             return false
@@ -1784,14 +1783,13 @@ var unicode_categories_contain_character = function (categories, cp) {
 var alpha_categories = ['Ll', 'Lu', 'Lm', 'Lt', 'Lo']
 var alnum_categories = ['Ll', 'Lu', 'Lm', 'Lt', 'Lo', 'Nd']
 
-str.isalnum = function(){
+str.isalnum = function(self){
     /* Return true if all characters in the string are alphanumeric and there
     is at least one character, false otherwise. A character c is alphanumeric
     if one of the following returns True: c.isalpha(), c.isdecimal(),
     c.isdigit(), or c.isnumeric(). */
-    var $ = $B.args("isalnum", 1, {self: null}, ["self"],
-            arguments, {}, null, null)
-    var _self = to_string($.self);
+    $B.check_nb_args_no_kw('str.isalnum', 2, arguments)
+    var _self = to_string(self);
     if (_self.length == 0) {
         return false
     }
@@ -1803,15 +1801,14 @@ str.isalnum = function(){
     return true
 }
 
-str.isalpha = function(){
+str.isalpha = function(self){
     /* Return true if all characters in the string are alphabetic and there is
     at least one character, false otherwise. Alphabetic characters are those
     characters defined in the Unicode character database as "Letter", i.e.,
     those with general category property being one of "Lm", "Lt", "Lu", "Ll",
     or "Lo". */
-    var $ = $B.args("isalpha", 1, {self: null}, ["self"],
-            arguments, {}, null, null)
-    var _self = to_string($.self);
+    $B.check_nb_args_no_kw('str.isalpha', 1, arguments)
+    var _self = to_string(self);
     if (_self.length == 0) {
         return false
     }
@@ -1823,16 +1820,15 @@ str.isalpha = function(){
     return true
 }
 
-str.isdecimal = function(){
+str.isdecimal = function(self){
     /* Return true if all characters in the string are decimal characters and
     there is at least one character, false otherwise. Decimal characters are
     those that can be used to form numbers in base 10, e.g. U+0660,
     ARABIC-INDIC DIGIT ZERO. Formally a decimal character is a character in
     the Unicode General Category "Nd". */
-    var $ = $B.args("isdecimal", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        cp,
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isdecimal', 2, arguments)
+    var cp,
+        _self = to_string(self)
     for(var char of _self){
         cp = _b_.ord(char)
         if(! $B.in_unicode_category('Nd', cp)){
@@ -1842,13 +1838,12 @@ str.isdecimal = function(){
     return _self.length > 0
 }
 
-str.isdigit = function(){
+str.isdigit = function(self){
     /* Return true if all characters in the string are digits and there is at
     least one character, false otherwise. */
-    var $ = $B.args("isdigit", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        cp,
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isdigit', 1, arguments)
+    var cp,
+        _self = to_string(self)
     for(var char of _self){
         if(/\p{Nd}/u.test(char)){
             continue
@@ -1862,12 +1857,11 @@ str.isdigit = function(){
     return _self.length > 0
 }
 
-str.isidentifier = function(){
+str.isidentifier = function(self){
     /* Return true if the string is a valid identifier according to the
     language definition. */
-    var $ = $B.args("isidentifier", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isidentifier', 1, arguments)
+    var _self = to_string(self)
     if(_self.length == 0){
         return false
     }
@@ -1885,14 +1879,13 @@ str.isidentifier = function(){
     return true
 }
 
-str.islower = function(){
+str.islower = function(self){
     /* Return true if all cased characters 4 in the string are lowercase and
     there is at least one cased character, false otherwise. */
-    var $ = $B.args("islower", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        has_cased = false,
+    $B.check_nb_args_no_kw('str.islower', 1, arguments)
+    var has_cased = false,
         cp,
-        _self = to_string($.self)
+        _self = to_string(self)
 
     for(var char of _self){
         cp = _b_.ord(char)
@@ -1909,16 +1902,15 @@ str.islower = function(){
 
 const numeric_re = /\p{Nd}|\p{Nl}|\p{No}/u
 
-str.isnumeric = function(){
+str.isnumeric = function(self){
     /* Return true if all characters in the string are numeric characters, and
     there is at least one character, false otherwise. Numeric characters
     include digit characters, and all characters that have the Unicode numeric
     value property, e.g. U+2155, VULGAR FRACTION ONE FIFTH. Formally, numeric
     characters are those with the property value Numeric_Type=Digit,
     Numeric_Type=Decimal or Numeric_Type=Numeric.*/
-    var $ = $B.args("isnumeric", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isnumeric', 1, arguments)
+    var _self = to_string(self)
     for(var char of _self){
         if((! numeric_re.test(char)) &&
                ! $B.in_unicode_category('Lo_numeric', _b_.ord(char))){
@@ -1931,15 +1923,13 @@ str.isnumeric = function(){
 // This regex should match the one in py2js.js
 var unprintable_re = /\p{Cc}|\p{Cf}|\p{Co}|\p{Cs}|\p{Zl}|\p{Zp}|\p{Zs}/u
 
-str.isprintable = function(){
+str.isprintable = function(self){
     /* Return true if all characters in the string are printable or the string
     is empty, false otherwise. Nonprintable characters are those characters
     defined in the Unicode character database as "Other" or "Separator",
     excepting the ASCII space (0x20) which is considered printable. */
-
-    var $ = $B.args("isprintable", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isprintable', 1, arguments)
+    var _self = to_string(self)
     for(var char of _self){
         if(char == ' '){
             continue
@@ -1951,17 +1941,16 @@ str.isprintable = function(){
     return true
 }
 
-str.isspace = function(){
+str.isspace = function(self){
     /* Return true if there are only whitespace characters in the string and
     there is at least one character, false otherwise.
 
     A character is whitespace if in the Unicode character database, either its
     general category is Zs ("Separator, space"), or its bidirectional class is
     one of WS, B, or S.*/
-    var $ = $B.args("isspace", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        cp,
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.isspace', 1, arguments)
+    var cp,
+        _self = to_string(self)
     for(var char of _self){
         cp = _b_.ord(char)
         if(! $B.in_unicode_category('Zs', cp) &&
@@ -1972,25 +1961,23 @@ str.isspace = function(){
     return _self.length > 0
 }
 
-str.istitle = function(){
+str.istitle = function(self){
     /* Return true if the string is a titlecased string and there is at least
     one character, for example uppercase characters may only follow uncased
     characters and lowercase characters only cased ones. Return false
     otherwise. */
-    var $ = $B.args("istitle", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+    $B.check_nb_args_no_kw('str.istitle', 1, arguments)
+    var _self = to_string(self)
     return _self.length > 0 && str.title(_self) == _self
 }
 
-str.isupper = function(){
+str.isupper = function(self){
     /* Return true if all cased characters 4 in the string are lowercase and
     there is at least one cased character, false otherwise. */
-    var $ = $B.args("islower", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        is_upper = false,
+    $B.check_nb_args_no_kw('str.isupper', 1, arguments)
+    var is_upper = false,
         cp,
-        _self = to_string($.self)
+        _self = to_string(self)
 
     for(var char of _self){
         cp = _b_.ord(char)
@@ -2006,13 +1993,12 @@ str.isupper = function(){
 }
 
 
-str.join = function(){
-    var $ = $B.args("join", 2, {self: null, iterable: null},
-            ["self", "iterable"], arguments, {}, null, null),
-        _self = to_string($.self)
+str.join = function(self, iterable){
+    $B.check_nb_args_no_kw('str.join', 2, arguments)
+    var _self = to_string(self)
 
-    var iterable = _b_.iter($.iterable),
-        res = [],
+    iterable = _b_.iter(iterable)
+    var res = [],
         count = 0
     while(1){
         try{
@@ -2026,8 +2012,9 @@ str.join = function(){
         }catch(err){
             if($B.$isinstance(err, _b_.StopIteration)){
                 break
+            }else{
+                throw err
             }
-            else{throw err}
         }
     }
     return res.join(_self)
@@ -2046,16 +2033,15 @@ str.ljust = function(){
     return _self + $.fillchar.repeat($.width - len)
 }
 
-str.lower = function(){
-    var $ = $B.args("lower", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+str.lower = function(self){
+    $B.check_nb_args_no_kw('str.lower', 1, arguments)
+    var _self = to_string(self)
     return _self.toLowerCase()
 }
 
 str.lstrip = function(){
     var $ = $B.args("lstrip", 2, {self: null, chars: null}, ["self", "chars"],
-            arguments, {chars:_b_.None}, null, null),
+            arguments, {chars: _b_.None}, null, null),
         _self = $.self,
         chars = $.chars
     if(chars === _b_.None){
@@ -2148,16 +2134,14 @@ str.maketrans = function() {
 
 str.maketrans.$type = "staticmethod"
 
-str.partition = function() {
-    var $ = $B.args("partition", 2, {self: null, sep: null}, ["self", "sep"],
-            arguments, {}, null, null),
-        _self,
-        sep
-    if($.sep == ""){
+str.partition = function(self, sep) {
+    $B.check_nb_args_no_kw('str.partition', 2, arguments)
+    var _self
+    if(sep == ""){
         throw _b_.ValueError.$factory("empty separator")
     }
-    check_str($.sep);
-    [_self, sep] = to_string([$.self, $.sep])
+    check_str(sep);
+    [_self, sep] = to_string([self, sep])
     var chars = to_chars(_self),
         i = _self.indexOf(sep)
     if(i == -1){
@@ -2167,30 +2151,28 @@ str.partition = function() {
         chars.slice(i + sep.length).join('')])
 }
 
-str.removeprefix = function(){
-    var $ = $B.args("removeprefix", 2, {self: null, prefix: null},
-            ["self", "prefix"], arguments, {}, null, null),
-        _self
-    if(!$B.$isinstance($.prefix, str)){
+str.removeprefix = function(self, prefix){
+    $B.check_nb_args_no_kw('str.removeprefix', 2, arguments)
+    var _self
+    if(!$B.$isinstance(prefix, str)){
         throw _b_.ValueError.$factory("prefix should be str, not " +
-            `'${$B.class_name($.prefix)}'`)
+            `'${$B.class_name(prefix)}'`)
     }
-    [_self, prefix] = to_string([$.self, $.prefix])
+    [_self, prefix] = to_string([self, prefix])
     if(str.startswith(_self, prefix)){
         return _self.substr(prefix.length)
     }
     return _self.substr(0)
 }
 
-str.removesuffix = function(){
-    var $ = $B.args("removesuffix", 2, {self: null, suffix: null},
-                ["self", "suffix"], arguments, {}, null, null),
-        _self
-    if(!$B.$isinstance($.suffix, str)){
+str.removesuffix = function(self, suffix){
+    $B.check_nb_args_no_kw('str.removesuffix', 2, arguments)
+    var _self
+    if(!$B.$isinstance(suffix, str)){
         throw _b_.ValueError.$factory("suffix should be str, not " +
-            `'${$B.class_name($.prefix)}'`)
+            `'${$B.class_name(suffix)}'`)
     }
-    [_self, suffix] = to_string([$.self, $.suffix])
+    [_self, suffix] = to_string([self, suffix])
     if(suffix.length > 0 && str.endswith(_self, suffix)){
         return _self.substr(0, _self.length - suffix.length)
     }
@@ -2329,13 +2311,10 @@ str.rjust = function() {
     return $B.String($.fillchar.repeat($.width - len) + _self)
 }
 
-str.rpartition = function(self,sep) {
-    var $ = $B.args("rpartition", 2, {self: null, sep: null}, ["self", "sep"],
-            arguments, {}, null, null),
-        _self
-    check_str($.sep);
-    [_self, sep] = [$.self, $.sep]
-    _self = reverse(_self),
+str.rpartition = function(self, sep) {
+    $B.check_nb_args_no_kw('str.rpartition', 2, arguments)
+    check_str(sep)
+    var _self = reverse(self),
     sep = reverse(sep)
     var items = str.partition(_self, sep).reverse()
     for(var i = 0; i < items.length; i++){
@@ -2544,11 +2523,10 @@ str.strip = function(){
 }
 
 str.swapcase = function(self){
-    var $ = $B.args("swapcase", 1, {self}, ["self"],
-            arguments, {}, null, null),
-        res = "",
+    $B.check_nb_args_no_kw('str.swapcase', 1, arguments)
+    var res = "",
         cp,
-        _self = to_string($.self)
+        _self = to_string(self)
     for(var char of _self){
         cp = _b_.ord(char)
         if($B.in_unicode_category('Ll', cp)){
@@ -2563,12 +2541,11 @@ str.swapcase = function(self){
 }
 
 str.title = function(self){
-    var $ = $B.args("title", 1, {self}, ["self"],
-            arguments, {}, null, null),
-        state,
+    $B.check_nb_args_no_kw('str.title', 1, arguments)
+    var state,
         cp,
         res = "",
-        _self = to_string($.self)
+        _self = to_string(self)
     for(var char of _self){
         cp = _b_.ord(char)
         if($B.in_unicode_category('Ll', cp)){
@@ -2590,14 +2567,12 @@ str.title = function(self){
     return res
 }
 
-str.translate = function(){
-    var $ = $B.args('translate', 2, {self: null, table: null},
-                ['self', 'table'], arguments, {}, null, null),
-        table = $.table,
-        res = [],
+str.translate = function(self, table){
+    $B.check_nb_args_no_kw('str.translate', 2, arguments)
+    var res = [],
         getitem = $B.$getattr(table, "__getitem__"),
         cp,
-        _self = to_string($.self)
+        _self = to_string(self)
     for(var char of _self){
         cp = _b_.ord(char)
         try{
@@ -2616,28 +2591,26 @@ str.translate = function(){
     return res.join("")
 }
 
-str.upper = function(){
-    var $ = $B.args("upper", 1, {self: null}, ["self"],
-            arguments, {}, null, null),
-        _self = to_string($.self)
+str.upper = function(self){
+    $B.check_nb_args_no_kw('str.upper', 1, arguments)
+    var _self = to_string(self)
     return _self.toUpperCase()
 }
 
-str.zfill = function(){
-    var $ = $B.args("zfill", 2, {self: null, width: null},
-            ["self", "width"], arguments, {}, null, null),
-        _self = to_string($.self)
+str.zfill = function(self, width){
+    $B.check_nb_args_no_kw('str.zfill', 2, arguments)
+    var _self = to_string(self)
     var len = str.__len__(_self)
-    if($.width <= len){
+    if(width <= len){
         return _self
     }
     switch(_self.charAt(0)){
         case "+":
         case "-":
             return _self.charAt(0) +
-                "0".repeat($.width - len) + _self.substr(1)
+                "0".repeat(width - len) + _self.substr(1)
         default:
-            return "0".repeat($.width - len) + _self
+            return "0".repeat(width - len) + _self
     }
 }
 
diff --git a/www/src/version_info.js b/www/src/version_info.js
index cffce56d0..373b8d5d7 100644
--- a/www/src/version_info.js
+++ b/www/src/version_info.js
@@ -1,7 +1,7 @@
 __BRYTHON__.implementation = [3, 13, 1, 'dev', 0]
 __BRYTHON__.version_info = [3, 13, 0, 'final', 0]
-__BRYTHON__.compiled_date = "2024-11-19 08:15:13.160628"
-__BRYTHON__.timestamp = 1732000513160
+__BRYTHON__.compiled_date = "2024-11-19 08:49:56.602863"
+__BRYTHON__.timestamp = 1732002596602
 __BRYTHON__.builtin_module_names = ["_ajax",
     "_ast",
     "_base64",