diff --git a/create-biglambda-role.py b/create-biglambda-role.py
index 846f222..f2cff9c 100644
--- a/create-biglambda-role.py
+++ b/create-biglambda-role.py
@@ -20,18 +20,18 @@
 
 try:
     response = client.create_role(RoleName=rn,AssumeRolePolicyDocument=json.dumps(trust_role))
-    print response['Role']['Arn']
-    print "Success: done creating role"
+    print(response['Role']['Arn'])
+    print("Success: done creating role")
 except botocore.exceptions.ClientError as e:
-    print "Error: {0}".format(e)
+    print("Error: {0}".format(e))
 
 try:
     with open('policy.json') as json_data:
         response = client.put_role_policy(RoleName=rn,PolicyName=rp,
             PolicyDocument=json.dumps(json.load(json_data))
         )
-        print "Success: done adding inline policy to role"
+        print("Success: done adding inline policy to role")
 except botocore.exceptions.ClientError as e:
-    print "Error: {0}".format(e)
+    print("Error: {0}".format(e))
 
 
diff --git a/delete-biglambda-role.py b/delete-biglambda-role.py
index 3129879..3461f54 100644
--- a/delete-biglambda-role.py
+++ b/delete-biglambda-role.py
@@ -6,12 +6,12 @@
 
 try:
     response = client.delete_role_policy(RoleName=rn,PolicyName=rp)
-    print "Success: done deleting role policy"
+    print("Success: done deleting role policy")
 except botocore.exceptions.ClientError as e:
-    print "Error: {0}".format(e)
+    print("Error: {0}".format(e))
  
 try:
     response = client.delete_role(RoleName=rn)
-    print "Success: done deleting role"
+    print("Success: done deleting role")
 except botocore.exceptions.ClientError as e:
-    print "Error: {0}".format(e)
+    print("Error: {0}".format(e))
diff --git a/src/python/driver.py b/src/python/driver.py
index cc313e1..f7ad88c 100755
--- a/src/python/driver.py
+++ b/src/python/driver.py
@@ -11,7 +11,7 @@
 import math
 import random
 import re
-import StringIO
+from io import StringIO
 import sys
 import time
 
@@ -172,7 +172,7 @@ def invoke_lambda(batches, m_id):
     #batch = [k['Key'] for k in batches[m_id-1]]
     batch = [k.key for k in batches[m_id-1]]
     xray_recorder.current_segment().put_annotation("batch_for_mapper_"+str(m_id), str(batch))
-    #print "invoking", m_id, len(batch)
+    #print("invoking", m_id, len(batch))
     resp = lambda_client.invoke( 
             FunctionName = mapper_lambda_name,
             InvocationType = 'RequestResponse',
@@ -186,10 +186,10 @@ def invoke_lambda(batches, m_id):
         )
     out = eval(resp['Payload'].read())
     mapper_outputs.append(out)
-    print "mapper output", out
+    print("mapper output", out)
     xray_recorder.end_segment()
 # Exec Parallel
-print "# of Mappers ", n_mappers 
+print("# of Mappers ", n_mappers)
 pool = ThreadPool(n_mappers)
 Ids = [i+1 for i in range(n_mappers)]
 invoke_lambda_partial = partial(invoke_lambda, batches)
@@ -205,7 +205,7 @@ def invoke_lambda(batches, m_id):
 pool.close()
 pool.join()
 
-print "all the mappers finished"
+print("all the mappers finished")
 xray_recorder.end_subsegment() #Invoke mappers
 
 # Delete Mapper function
@@ -241,11 +241,11 @@ def invoke_lambda(batches, m_id):
     keys = [jk["Key"] for jk in job_keys]
     total_s3_size = sum([jk["Size"] for jk in job_keys])
     
-    print "check to see if the job is done"
+    print("check to see if the job is done")
 
     # check job done
     if job_id + "/result" in keys:
-        print "job done"
+        print("job done")
         reducer_lambda_time += float(s3.Object(job_bucket, job_id + "/result").metadata['processingtime'])
         for key in keys:
             if "task/reducer" in key:
@@ -268,14 +268,14 @@ def invoke_lambda(batches, m_id):
 lambda_cost = total_lambda_secs * 0.00001667 * lambda_memory/ 1024.0
 s3_cost =  (s3_get_cost + s3_put_cost + s3_storage_hour_cost)
 
-# Print costs
-print "Reducer L", reducer_lambda_time * 0.00001667 * lambda_memory/ 1024.0
-print "Lambda Cost", lambda_cost
-print "S3 Storage Cost", s3_storage_hour_cost
-print "S3 Request Cost", s3_get_cost + s3_put_cost 
-print "S3 Cost", s3_cost 
-print "Total Cost: ", lambda_cost + s3_cost
-print "Total Lines:", total_lines 
+# printcosts
+print("Reducer L", reducer_lambda_time * 0.00001667 * lambda_memory/ 1024.0)
+print("Lambda Cost", lambda_cost)
+print("S3 Storage Cost", s3_storage_hour_cost)
+print("S3 Request Cost", s3_get_cost + s3_put_cost)
+print("S3 Cost", s3_cost)
+print("Total Cost: ", lambda_cost + s3_cost)
+print("Total Lines:", total_lines)
 xray_recorder.end_subsegment() #Calculate cost
 
 # Delete Reducer function
diff --git a/src/python/lambdautils.py b/src/python/lambdautils.py
index 45479d0..dc90fdb 100755
--- a/src/python/lambdautils.py
+++ b/src/python/lambdautils.py
@@ -38,7 +38,7 @@ def create_lambda_function(self):
                       TracingConfig={'Mode':'PassThrough'}
                     )
         self.function_arn = response['FunctionArn']
-        print response
+        print(response)
 
     def update_function(self):
         '''
@@ -53,7 +53,7 @@ def update_function(self):
         # parse arn and remove the release number (:n) 
         arn = ":".join(updated_arn.split(':')[:-1])
         self.function_arn = arn 
-        print response
+        print(response)
 
     def update_code_or_create_on_noexist(self):
         '''
@@ -73,7 +73,7 @@ def add_lambda_permission(self, sId, bucket):
           StatementId = '%s' % sId,
           SourceArn = 'arn:aws:s3:::' + bucket
         )
-        print resp
+        print(resp)
 
     def create_s3_eventsource_notification(self, bucket, prefix=None):
         if not prefix:
@@ -126,7 +126,7 @@ def compute_batch_size(keys, lambda_memory, concurrent_lambdas):
         else:
             size += key.size
     avg_object_size = size/len(keys)
-    print "Dataset size: %s, nKeys: %s, avg: %s" %(size, len(keys), avg_object_size)
+    print("Dataset size: %s, nKeys: %s, avg: %s" %(size, len(keys), avg_object_size))
     if avg_object_size < max_mem_for_data and len(keys) < concurrent_lambdas:
         b_size = 1
     else:
diff --git a/src/python/mapper.py b/src/python/mapper.py
index 1145aa4..0b12863 100644
--- a/src/python/mapper.py
+++ b/src/python/mapper.py
@@ -9,7 +9,7 @@
 import json
 import random
 import resource
-import StringIO
+from io import StringIO
 import time
 
 # create an S3 session
@@ -53,7 +53,7 @@ def lambda_handler(event, context):
                     output[srcIp] = 0
                 output[srcIp] += float(data[3])
             except Exception, e:
-                print e
+                print(e)
                 #err += '%s' % e
 
     time_in_secs = (time.time() - start_time)
@@ -68,7 +68,7 @@ def lambda_handler(event, context):
                     "memoryUsage": '%s' % resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
                }
 
-    print "metadata", metadata
+    print("metadata", metadata)
     write_to_s3(job_bucket, mapper_fname, json.dumps(output), metadata)
     return pret
 
diff --git a/src/python/reducer.py b/src/python/reducer.py
index a5fcc75..11d7ccc 100644
--- a/src/python/reducer.py
+++ b/src/python/reducer.py
@@ -9,7 +9,7 @@
 import json
 import random
 import resource
-import StringIO
+from io import StringIO
 import urllib2
 import time
 
@@ -55,14 +55,14 @@ def lambda_handler(event, context):
                     results[srcIp] = 0
                 results[srcIp] += float(val)
         except Exception, e:
-            print e
+            print(e)
 
     time_in_secs = (time.time() - start_time)
     #timeTaken = time_in_secs * 1000000000 # in 10^9 
     #s3DownloadTime = 0
     #totalProcessingTime = 0 
     pret = [len(reducer_keys), line_count, time_in_secs]
-    print "Reducer ouputput", pret
+    print("Reducer ouputput", pret)
 
     if n_reducers == 1:
         # Last reducer file, final result
diff --git a/src/python/reducerCoordinator.py b/src/python/reducerCoordinator.py
index 2247715..1ceb7ef 100644
--- a/src/python/reducerCoordinator.py
+++ b/src/python/reducerCoordinator.py
@@ -10,7 +10,7 @@
 import lambdautils
 import random
 import re
-import StringIO
+from io import StringIO
 import time
 import urllib
 
@@ -127,33 +127,33 @@ def lambda_handler(event, context):
     files = s3_client.list_objects(Bucket=bucket, Prefix=job_id)["Contents"]
 
     if check_job_done(files) == True:
-        print "Job done!!! Check the result file"
+        print("Job done!!! Check the result file")
         # TODO:  Delete reducer and coordinator lambdas
         return
     else:
         ### Stateless Coordinator logic
         mapper_keys = get_mapper_files(files)
-        print "Mappers Done so far ", len(mapper_keys)
+        print("Mappers Done so far ", len(mapper_keys))
 
         if map_count == len(mapper_keys):
             
             # All the mappers have finished, time to schedule the reducers
             stepInfo = get_reducer_state_info(files, job_id, bucket)
 
-            print "stepInfo", stepInfo
+            print("stepInfo", stepInfo)
 
             step_number = stepInfo[0];
             reducer_keys = stepInfo[1];
                
             if len(reducer_keys) == 0:
-                print "Still waiting to finish Reducer step ", step_number
+                print("Still waiting to finish Reducer step ", step_number)
                 return
                  
             # Compute this based on metadata of files
             r_batch_size = get_reducer_batch_size(reducer_keys); 
                 
-            print "Starting the the reducer step", step_number
-            print "Batch Size", r_batch_size
+            print("Starting the the reducer step", step_number)
+            print("Batch Size", r_batch_size)
                 
             # Create Batch params for the Lambda function
             r_batch_params = lambdautils.batch_creator(reducer_keys, r_batch_size);
@@ -180,13 +180,13 @@ def lambda_handler(event, context):
                             "reducerId": i 
                         })
                     )
-                print resp
+                print(resp)
 
             # Now write the reducer state
             fname = "%s/reducerstate.%s"  % (job_id, step_id)
             write_reducer_state(n_reducers, n_s3, bucket, fname)
         else:
-            print "Still waiting for all the mappers to finish .."
+            print("Still waiting for all the mappers to finish ..")
 
 '''
 ev = {
diff --git a/src/python/s3_download_benchmark.py b/src/python/s3_download_benchmark.py
index 22af5ed..3fc5cb5 100644
--- a/src/python/s3_download_benchmark.py
+++ b/src/python/s3_download_benchmark.py
@@ -25,8 +25,8 @@ def lambda_handler(event, context):
         contents = response['Body'].read()
 
     time_in_secs = (time.time() - start_time)
-    print "Time taken (s)",  time_in_secs
-    print "Size (MB)", total_bytes / 1024/1024
+    print("Time taken (s)",  time_in_secs)
+    print("Size (MB)", total_bytes / 1024/1024)
     return time_in_secs 
 
 '''