From 066ad67bdb446d79177e42e15771ce4bd60b53dc Mon Sep 17 00:00:00 2001
From: deepankar <deepankar11093@gmail.com>
Date: Thu, 30 Mar 2017 17:28:49 +0530
Subject: [PATCH] fixes intersection

---
 python/common/org/python/types/Set.java | 19 +++++++++----------
 tests/datatypes/test_set.py             | 15 +++++++++++++--
 2 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/python/common/org/python/types/Set.java b/python/common/org/python/types/Set.java
index f539495bc2..392eb5e74d 100644
--- a/python/common/org/python/types/Set.java
+++ b/python/common/org/python/types/Set.java
@@ -276,7 +276,7 @@ public org.python.Object __mul__(org.python.Object other) {
     // }
 
     @org.python.Method(
-        __doc__ = ""
+            __doc__ = ""
     )
     public org.python.Object __and__(org.python.Object other) {
         java.util.Set set = ((org.python.types.Set) this.copy()).value;
@@ -424,9 +424,12 @@ public org.python.Object __iadd__(org.python.Object other) {
             args = {"other"}
     )
     public org.python.Object intersection(org.python.Object other) {
-        java.util.Set set = ((Set) this.copy()).value;
-        set.retainAll(((Set) other).value);
-        return new Set(set);
+        try {
+            org.python.types.Set otherSet = new org.python.types.Set(new org.python.Object[] {other}, null);
+            return this.__and__(otherSet);
+        } catch (org.python.exceptions.AttributeError e) {
+            throw new org.python.exceptions.TypeError("'" + other.typeName() + "' object is not iterable");
+        }
     }
 
     @org.python.Method(
@@ -451,9 +454,7 @@ public org.python.Object isdisjoint(org.python.Object other) {
     )
     public org.python.Object issubset(org.python.Object other) {
         try {
-            org.python.Object[] arrObject = new org.python.Object[1];
-            arrObject[0] = other;
-            org.python.types.Set otherSet = new org.python.types.Set(arrObject, null);
+            org.python.types.Set otherSet = new org.python.types.Set(new org.python.Object[] {other}, null);
             return this.__le__(otherSet);
         } catch (org.python.exceptions.AttributeError e) {
             throw new org.python.exceptions.TypeError("'" + other.typeName() + "' object is not iterable");
@@ -466,9 +467,7 @@ public org.python.Object issubset(org.python.Object other) {
     )
     public org.python.Object issuperset(org.python.Object other) {
         try {
-            org.python.Object[] arrObject = new org.python.Object[1];
-            arrObject[0] = other;
-            org.python.types.Set otherSet = new org.python.types.Set(arrObject, null);
+            org.python.types.Set otherSet = new org.python.types.Set(new org.python.Object[] {other}, null);
             return this.__ge__(otherSet);
         } catch (org.python.exceptions.AttributeError e) {
             throw new org.python.exceptions.TypeError("'" + other.typeName() + "' object is not iterable");
diff --git a/tests/datatypes/test_set.py b/tests/datatypes/test_set.py
index 55f6ef0aa2..e9ff8ff6a6 100644
--- a/tests/datatypes/test_set.py
+++ b/tests/datatypes/test_set.py
@@ -114,9 +114,11 @@ def test_intersection(self):
             x = {1, 2, 3}
             y = {3, 4, 5}
             z = x.intersection(y)
+            w = x.intersection([3,4,5])
             print(x)
             print(y)
             print(z)
+            print(w)
             """)
 
         self.assertCodeExecution("""
@@ -128,6 +130,15 @@ def test_intersection(self):
             print(z)
             """)
 
+        # not iterable test
+        self.assertCodeExecution("""
+            x = set([1, 2, 3])
+            try:
+                print(x.intersection(1))
+            except TypeError as err:
+                print(err)
+            """)
+
     def test_remove(self):
         self.assertCodeExecution("""
             x = {1, 2, 3}
@@ -188,7 +199,7 @@ def test_issubset(self):
         self.assertCodeExecution("""
             a = set('abc')
             b = set('abcde')
-            print(a.issubset(b)
+            print(a.issubset(b))
             print(a.issubset('ab'))
             """)
 
@@ -205,7 +216,7 @@ def test_issuperset(self):
         self.assertCodeExecution("""
             a = set('abcd')
             b = set('ab')
-            print(a.issuperset(b)
+            print(a.issuperset(b))
             print(a.issuperset('ab1'))
             """)