Fixes #558 : a set isn't properly cloned by "a = set(b)" statement

www/src/brython.js

@@ -61,7 +61,7 @@ $B.regexIdentifier=/^(?:[\$A-Z_a-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C
 __BRYTHON__.implementation=[3,3,1,'alpha',0]
 __BRYTHON__.__MAGIC__="3.3.1"
 __BRYTHON__.version_info=[3,3,0,'alpha',0]
-__BRYTHON__.compiled_date="2017-02-05 21:43:42.821780"
+__BRYTHON__.compiled_date="2017-02-06 15:25:19.796403"
 __BRYTHON__.builtin_module_names=["posix","sys","errno","time","_ajax","_base64","_jsre","_multiprocessing","_posixsubprocess","_profile","_svg","_sys","builtins","dis","hashlib","json","long_int","math","modulefinder","random","_abcoll","_codecs","_collections","_csv","_functools","_imp","_io","_random","_socket","_sre","_string","_struct","_sysconfigdata","_testcapi","_thread","_warnings","_weakref"]
 
 ;(function($B){var js,$pos,res,$op
@@ -9763,7 +9763,7 @@ $SetDict.__format__=function(self,format_string){return $SetDict.__str__(self)}
 $SetDict.__ge__=function(self,other){if(_b_.isinstance(other,[set,frozenset])){return !$SetDict.__lt__(self,other)}else{return _b_.object.$dict.__ge__(self,other)}}
 $SetDict.__gt__=function(self,other){if(_b_.isinstance(other,[set,frozenset])){return !$SetDict.__le__(self,other)}else{return _b_.object.$dict.__gt__(self,other)}}
 $SetDict.__init__=function(self){var $=$B.args('__init__',2,{self:null,iterable:null},['self','iterable'],arguments,{iterable:[]},null,null),self=$.self,iterable=$.iterable
-if(_b_.isinstance(iterable,[set,frozenset])){self.$items=iterable.$items
+if(_b_.isinstance(iterable,[set,frozenset])){self.$items=iterable.$items.slice()
 return $N}
 var it=_b_.iter(iterable),obj={$items:[],$str:true,$num:true}
 while(1){try{var item=_b_.next(it)

www/src/py_set.js

@@ -135,16 +135,16 @@ $SetDict.__init__ = function(self){
         ['self', 'iterable'], arguments, {iterable:[]}, null,null),
         self = $.self, iterable= $.iterable
 
-    if(_b_.isinstance(iterable,[set,frozenset])){
-        self.$items = iterable.$items
+    if(_b_.isinstance(iterable,[set, frozenset])){
+        self.$items = iterable.$items.slice()
         return $N
     }
     var it = _b_.iter(iterable),
-        obj = {$items:[],$str:true,$num:true}
+        obj = {$items:[], $str:true, $num:true}
     while(1){
         try{
             var item = _b_.next(it)
-            $SetDict.add(obj,item)
+            $SetDict.add(obj, item)
         }catch(err){
             if(_b_.isinstance(err, _b_.StopIteration)){break}
             throw err
@@ -533,10 +533,10 @@ function set(){
     // $str is true if all the elements in the set are string, $num if
     // all the elements are integers
     // They are used to speed up operations on sets
-    var res = {__class__:$SetDict,$str:true,$num:true,$items:[]}
+    var res = {__class__:$SetDict,$str:true, $num:true, $items:[]}
     // apply __init__ with arguments of set()
     var args = [res].concat(Array.prototype.slice.call(arguments))
-    $SetDict.__init__.apply(null,args)
+    $SetDict.__init__.apply(null, args)
     return res
 }
 set.__class__ = $B.$factory

www/src/version_info.js

@@ -1,7 +1,7 @@
 __BRYTHON__.implementation = [3, 3, 1, 'alpha', 0]
 __BRYTHON__.__MAGIC__ = "3.3.1"
 __BRYTHON__.version_info = [3, 3, 0, 'alpha', 0]
-__BRYTHON__.compiled_date = "2017-02-05 21:43:42.821780"
+__BRYTHON__.compiled_date = "2017-02-06 15:25:19.796403"
 __BRYTHON__.builtin_module_names = ["posix","sys","errno", "time","_ajax",
     "_base64",
     "_jsre",

www/tests/issues.py

@@ -1163,6 +1163,12 @@ def __float__(self):
 assert sin(num) == -0.9165215479156338
 assert log(num) == 3.7376696182833684
 
+# issue 558
+a = set([5, 10])
+b = set(a)
+a.difference_update([5])
+assert a == {10}
+assert b == {5, 10}
 
 # ==========================================
 # Finally, report that all tests have passed