diff --git a/examples/safe_remote_purchase/safe_remote_purchase.vy b/examples/safe_remote_purchase/safe_remote_purchase.vy
index de6ab373a3..6e694294ad 100644
--- a/examples/safe_remote_purchase/safe_remote_purchase.vy
+++ b/examples/safe_remote_purchase/safe_remote_purchase.vy
@@ -23,31 +23,32 @@ ended: public(bool)
 @payable
 def __init__():
     assert (msg.value % 2) == 0
-    self.value = msg.value / 2  #The seller initializes the contract by
-        #posting a safety deposit of 2*value of the item up for sale.
+    self.value = msg.value / 2  # The seller initializes the contract by
+        # posting a safety deposit of 2*value of the item up for sale.
     self.seller = msg.sender
     self.unlocked = True
 
 @public
 def abort():
     assert self.unlocked #Is the contract still refundable?
-    assert msg.sender == self.seller #Only the seller can refund
+    assert msg.sender == self.seller # Only the seller can refund
         # his deposit before any buyer purchases the item.
-    selfdestruct(self.seller) #Refunds the seller and deletes the contract.
+    selfdestruct(self.seller) # Refunds the seller and deletes the contract.
 
 @public
 @payable
 def purchase():
-    assert self.unlocked #Is the contract still open (is the item still up for sale)?
-    assert msg.value == (2 * self.value) #Is the deposit the correct value?
+    assert self.unlocked # Is the contract still open (is the item still up
+                         # for sale)?
+    assert msg.value == (2 * self.value) # Is the deposit the correct value?
     self.buyer = msg.sender
     self.unlocked = False
 
 @public
 def received():
     # 1. Conditions
-    assert not self.unlocked #Is the item already purchased and pending confirmation
-        # from the buyer?
+    assert not self.unlocked # Is the item already purchased and pending
+                             # confirmation from the buyer?
     assert msg.sender == self.buyer
     assert not self.ended
 
@@ -55,6 +56,6 @@ def received():
     self.ended = True
 
     # 3. Interaction
-    send(self.buyer, self.value) #Return the buyer's deposit (=value) to the buyer.
-    selfdestruct(self.seller) #Return the seller's deposit (=2*value)
-        # and the purchase price (=value) to the seller.
+    send(self.buyer, self.value) # Return the buyer's deposit (=value) to the buyer.
+    selfdestruct(self.seller) # Return the seller's deposit (=2*value) and the
+                              # purchase price (=value) to the seller.