Update address-book.py for python3

examples/address-book.py

@@ -6,64 +6,64 @@
 env = lmdb.open('/tmp/address-book.lmdb', max_dbs=10)
 
 # Now create subdbs for home and business addresses.
-home_db = env.open_db('home')
-business_db = env.open_db('business')
+home_db = env.open_db(b'home')
+business_db = env.open_db(b'business')
 
 
 # Add some telephone numbers to each DB:
 with env.begin(write=True) as txn:
-    txn.put('mum', '012345678', db=home_db)
-    txn.put('dad', '011232211', db=home_db)
-    txn.put('dentist', '044415121', db=home_db)
-    txn.put('hospital', '078126321', db=home_db)
+    txn.put(b'mum', b'012345678', db=home_db)
+    txn.put(b'dad', b'011232211', db=home_db)
+    txn.put(b'dentist', b'044415121', db=home_db)
+    txn.put(b'hospital', b'078126321', db=home_db)
 
-    txn.put('vendor', '0917465628', db=business_db)
-    txn.put('customer', '0553211232', db=business_db)
-    txn.put('coworker', '0147652935', db=business_db)
-    txn.put('boss', '0123151232', db=business_db)
-    txn.put('manager', '0644810485', db=business_db)
+    txn.put(b'vendor', b'0917465628', db=business_db)
+    txn.put(b'customer', b'0553211232', db=business_db)
+    txn.put(b'coworker', b'0147652935', db=business_db)
+    txn.put(b'boss', b'0123151232', db=business_db)
+    txn.put(b'manager', b'0644810485', db=business_db)
 
 
 # Iterate each DB to show the keys are sorted:
 with env.begin() as txn:
     for name, db in ('home', home_db), ('business', business_db):
-        print 'DB:', name
+        print('DB:', name)
         for key, value in txn.cursor(db=db):
-            print '  ', key, value
-        print
+            print('  ', key, value)
+        print()
 
 
 # Now let's update some phone numbers. We can specify the default subdb when
 # starting the transaction, rather than pass it in every time:
 with env.begin(write=True, db=home_db) as txn:
-    print 'Updating number for dentist'
-    txn.put('dentist', '099991231')
+    print('Updating number for dentist')
+    txn.put(b'dentist', b'099991231')
 
-    print 'Deleting number for hospital'
-    txn.delete('hospital')
-    print
+    print('Deleting number for hospital')
+    txn.delete(b'hospital')
+    print()
 
-    print 'Home DB is now:'
+    print('Home DB is now:')
     for key, value in txn.cursor():
-        print '  ', key, value
-    print
+        print('  ', key, value)
+    print()
 
 
 # Now let's look up a number in the business DB
 with env.begin(db=business_db) as txn:
-    print 'Boss telephone number:', txn.get('boss')
-    print
+    print('Boss telephone number:', txn.get(b'boss'))
+    print()
 
 
 # We got fired, time to delete all keys from the business DB.
 with env.begin(write=True) as txn:
-    print 'Deleting all numbers from business DB:'
+    print('Deleting all numbers from business DB:')
     txn.drop(business_db, delete=False)
 
-    print 'Adding number for recruiter to business DB'
-    txn.put('recruiter', '04123125324', db=business_db)
+    print('Adding number for recruiter to business DB')
+    txn.put(b'recruiter', b'04123125324', db=business_db)
 
-    print 'Business DB is now:'
+    print('Business DB is now:')
     for key, value in txn.cursor(db=business_db):
-        print '  ', key, value
-    print
+        print('  ', key, value)
+    print()