diff --git a/src/stats.py b/src/stats.py
--- a/src/stats.py
+++ b/src/stats.py
@@ -1,48 +1,55 @@
 class Stats:
 	def __init__(self):
-		self.received=0
-		self.sent=0
-		self.exchangedNodes=0
-		self.transferredBlocks=0
+		self.received = 0
+		self.sent = 0
+		self.exchangedNodes = 0
+		self.transferredBlocks = 0
 
-stats=Stats()
+stats = Stats()
 
 
 def logReceived(data):
-	stats.received+=len(data)
+	stats.received += len(data)
 
 
 def logSent(data):
-	stats.sent+=len(data)
+	stats.sent += len(data)
 
 
 def logExchangedNode(k=1):
-	stats.exchangedNodes+=k
+	stats.exchangedNodes += k
 
 
 def logTransferredBlock(k=1):
-	stats.transferredBlocks+=k
+	stats.transferredBlocks += k
 
 
 def reset():
 	global stats
-	stats=Stats()
+	stats = Stats()
 
 
 def report():
 	return """received {rf} ({r:,} B)
 sent {sf} ({s:,} B)
 exchanged {nodes:,} hash tree nodes
-transferred {blocks:,} blocks""".format(rf=formatBytes(stats.received), r=stats.received, sf=formatBytes(stats.sent), s=stats.sent, nodes=stats.exchangedNodes, blocks=stats.transferredBlocks)
+transferred {blocks:,} blocks""".format(
+		rf=formatBytes(stats.received),
+		r=stats.received,
+		sf=formatBytes(stats.sent),
+		s=stats.sent,
+		nodes=stats.exchangedNodes,
+		blocks=stats.transferredBlocks
+	)
 
 
 def formatBytes(x):
-	exts=["B","kiB","MiB","GiB","TiB","PiB"]
-	i=0
+	exts = ["B", "kiB", "MiB", "GiB", "TiB", "PiB"]
+	i = 0
 	while x>1024:
-		x/=1024
-		i+=1
-	if x>=100: x=round(x)
-	elif x>=10: x=round(x,1)
-	else: x=round(x,2)
-	return "{0} {1}".format(x,exts[i])
+		x /= 1024
+		i += 1
+	if x>=100: x = round(x)
+	elif x>=10: x = round(x, 1)
+	else: x = round(x, 2)
+	return "{0} {1}".format(x, exts[i])