From 570974b960bb0a003d58a917ff7d1548a738fad8 Mon Sep 17 00:00:00 2001
From: rsiddharth <rsiddharth@ninthfloor.org>
Date: Sun, 25 Jan 2015 09:24:49 -0500
Subject: [PATCH] [addresses issue #7] implemented `has(key)' method for the
 pickledb class.

The `has(key)' method returns True if 'key is present in the db; False
otherwise.

Also wrote the test method -- testHas() -- in tests.py, to test the
`has(key)' method.

modded pickledb.py, tests.py
---
 pickledb.py | 6 +++++-
 tests.py    | 8 +++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/pickledb.py b/pickledb.py
index 6110e18..b527b49 100644
--- a/pickledb.py
+++ b/pickledb.py
@@ -74,7 +74,11 @@ def rem(self, key):
         del self.db[key]
         self._dumpdb(self.fsave)
         return True
-    
+
+    def has(self, key):
+        '''Returns True if key exists; False otherwise'''
+        return self.db.has_key(key)
+
     def lcreate(self, name):
         '''Create a list'''
         self.db[name] = []
diff --git a/tests.py b/tests.py
index ddf6392..d17788c 100644
--- a/tests.py
+++ b/tests.py
@@ -42,6 +42,12 @@ def testRemoveString(self):
         c = self.db.get('var')
         self.assertTrue(a == b and b != c and c == None)
 
+    def testHas(self):
+        a = self.teststring
+        self.db.set('var', a)
+        self.assertTrue(self.db.has('var'))
+        self.db.rem('var')
+        self.assertFalse(self.db.has('var'))
 
 if __name__ == '__main__':
-    unittest.main()
\ No newline at end of file
+    unittest.main()