diff --git a/examples/charge.py b/examples/charge.py
index 272a11007..a653ca4b9 100644
--- a/examples/charge.py
+++ b/examples/charge.py
@@ -1,8 +1,13 @@
+from __future__ import absolute_import, division, print_function
+
+import os
+
 import stripe
 
-stripe.api_key = 'tGN0bIwXnHdwOa85VABjPdSn8nWY7G7I'
 
-print "Attempting charge..."
+stripe.api_key = os.environ.get('STRIPE_SECRET_KEY')
+
+print("Attempting charge...")
 
 resp = stripe.Charge.create(
     amount=200,
@@ -11,4 +16,4 @@
     description='customer@gmail.com'
 )
 
-print 'Success: %r' % (resp, )
+print('Success: %r' % (resp))
diff --git a/examples/oauth.py b/examples/oauth.py
index c8c43f097..a9a3ce990 100644
--- a/examples/oauth.py
+++ b/examples/oauth.py
@@ -1,3 +1,5 @@
+from __future__ import absolute_import, division, print_function
+
 import os
 
 import stripe
diff --git a/examples/proxy.py b/examples/proxy.py
index ac115d036..b85d7f349 100644
--- a/examples/proxy.py
+++ b/examples/proxy.py
@@ -1,26 +1,30 @@
+from __future__ import absolute_import, division, print_function
+
+import os
+
 import stripe
 
 
-stripe.api_key = 'tGN0bIwXnHdwOa85VABjPdSn8nWY7G7I'
+stripe.api_key = os.environ.get('STRIPE_SECRET_KEY')
 
-print( "Attempting charge..." )
+print("Attempting charge...")
 
 stripe.proxy = {
     "http": "http://<user>:<pass>@<proxy>:<port>",
-    "https": "http://<user>:<pass>@<proxy>:<port>" }
-
-clients = ( 
-    stripe.http_client.RequestsClient( 
-        verify_ssl_certs= stripe.verify_ssl_certs,
-        proxy= stripe.proxy )
-    ,
-    stripe.http_client.PycurlClient( 
-        verify_ssl_certs= stripe.verify_ssl_certs,
-        proxy= stripe.proxy )
-    ,
-    stripe.http_client.Urllib2Client( 
-        verify_ssl_certs= stripe.verify_ssl_certs,
-        proxy= stripe.proxy ) )
+    "https": "http://<user>:<pass>@<proxy>:<port>",
+}
+
+clients = (
+    stripe.http_client.RequestsClient(
+        verify_ssl_certs=stripe.verify_ssl_certs,
+        proxy=stripe.proxy),
+    stripe.http_client.PycurlClient(
+        verify_ssl_certs=stripe.verify_ssl_certs,
+        proxy=stripe.proxy),
+    stripe.http_client.Urllib2Client(
+        verify_ssl_certs=stripe.verify_ssl_certs,
+        proxy=stripe.proxy),
+)
 
 for c in clients:
     stripe.default_http_client = c
@@ -30,4 +34,4 @@
         card='tok_visa',
         description='customer@gmail.com'
     )
-    print( 'Success: %s, %r' % ( c.name, resp, ) )
+    print('Success: %s, %r' % (c.name, resp))
diff --git a/examples/webhooks.py b/examples/webhooks.py
index 25bba33aa..024cf24be 100644
--- a/examples/webhooks.py
+++ b/examples/webhooks.py
@@ -1,10 +1,11 @@
-from __future__ import print_function
+from __future__ import absolute_import, division, print_function
 
 import os
 
 import stripe
 from flask import Flask, request
 
+
 stripe.api_key = os.environ.get('STRIPE_SECRET_KEY')
 webhook_secret = os.environ.get('WEBHOOK_SECRET')