Fix * in multi-target assignment

test/simple_source/stmts/04_multi_assign.py

@@ -0,0 +1,3 @@
+# Bug from Python 3.4 ftplib
+cls_or_self, *rest = args
+a, *b, c = args

uncompyle6/parsers/parse3.py

@@ -445,10 +445,6 @@ class Python3Parser(PythonParser):
             setcomp ::= {expr}^n LOAD_SETCOMP MAKE_CLOSURE
                         GET_ITER CALL_FUNCTION_1
 
-            dictcomp ::= LOAD_DICTCOMP MAKE_FUNCTION_0 expr
-                         GET_ITER CALL_FUNCTION_1
-
-
             # build_class (see load_build_class)
 
             build_list  ::= {expr}^n BUILD_LIST_n
@@ -456,9 +452,10 @@ class Python3Parser(PythonParser):
 
             load_closure  ::= {LOAD_CLOSURE}^n BUILD_TUPLE_n
 
-            unpack_list ::= UNPACK_LIST {expr}^n
-            unpack      ::= UNPACK_TUPLE {expr}^n
-            unpack      ::= UNPACK_SEQEUENCE {expr}^n
+            unpack_list ::= UNPACK_LIST_n {expr}^n
+            unpack      ::= UNPACK_TUPLE_n {expr}^n
+            unpack      ::= UNPACK_SEQEUENCE_n {expr}^n
+            unpack_ex ::=   UNPACK_EX_b_a {expr}^(a+b)
 
             mkfunc      ::= {pos_arg}^n LOAD_CONST MAKE_FUNCTION_n
             mklambda    ::= {pos_arg}^n LOAD_LAMBDA MAKE_FUNCTION_n
@@ -524,6 +521,10 @@ class Python3Parser(PythonParser):
                     self.add_unique_rule(rule, opname, token.attr, customize)
                     rule = "mapexpr ::=  %s %s" % (opname, kvlist_n)
                 self.add_unique_rule(rule, opname, token.attr, customize)
+            elif opname_base in ('UNPACK_EX'):
+                before_count, after_count = token.attr
+                rule = 'unpack ::= ' + opname + ' designator' * (before_count + after_count + 1)
+                self.add_unique_rule(rule, opname, token.attr, customize)
             elif opname_base in ('UNPACK_TUPLE', 'UNPACK_SEQUENCE'):
                 rule = 'unpack ::= ' + opname + ' designator' * token.attr
                 self.add_unique_rule(rule, opname, token.attr, customize)

uncompyle6/scanners/scanner3.py

@@ -91,6 +91,7 @@ class Scanner3(scan.Scanner):
 
         for inst in bytecode:
 
+            argval = inst.argval
             if inst.offset in jump_targets:
                 jump_idx = 0
                 for jump_offset in jump_targets[inst.offset]:
@@ -153,6 +154,14 @@ class Scanner3(scan.Scanner):
                             ):
                 pos_args = inst.argval
                 opname = '%s_%d' % (opname, pos_args)
+            elif opname == 'UNPACK_EX':
+                # FIXME: try with scanner and parser by
+                # changing inst.argval
+                before_args = inst.argval & 0xFF
+                after_args = (inst.argval >> 8) & 0xff
+                pattr = "%d before vararg, %d after" % (before_args, after_args)
+                argval = (before_args, after_args)
+                opname = '%s_%d+%d' % (opname, before_args, after_args)
             elif opname == 'JUMP_ABSOLUTE':
                 pattr = inst.argval
                 target = self.get_target(inst.offset)
@@ -171,7 +180,7 @@ class Scanner3(scan.Scanner):
             tokens.append(
                 Token(
                     type_ = opname,
-                    attr = inst.argval,
+                    attr = argval,
                     pattr = pattr,
                     offset = inst.offset,
                     linestart = inst.starts_line,
@@ -308,7 +317,7 @@ class Scanner3(scan.Scanner):
 
         designator_ops = set([
             STORE_FAST, STORE_NAME, STORE_GLOBAL, STORE_DEREF, STORE_ATTR,
-            STORE_SUBSCR, UNPACK_SEQUENCE, JUMP_ABSOLUTE
+            STORE_SUBSCR, UNPACK_SEQUENCE, JUMP_ABSOLUTE, UNPACK_EX
         ])
 
         # Compose preliminary list of indices with statements,

uncompyle6/semantics/pysource.py

@@ -1432,6 +1432,20 @@ class SourceWalker(GenericASTTraversal, object):
         self.prune()
 
     def n_unpack(self, node):
+        if node[0].type.startswith('UNPACK_EX'):
+            # Python 3+
+            before_count, after_count = node[0].attr
+            for i in range(before_count+1):
+                self.preorder(node[i])
+                if i != 0:
+                    self.write(', ')
+            self.write('*')
+            for i in range(1, after_count+2):
+                self.preorder(node[before_count+i])
+                if i != after_count + 1:
+                    self.write(', ')
+            self.prune()
+            return
         for n in node[1:]:
             if n[0].type == 'unpack':
                 n[0].type = 'unpack_w_parens'