add ser and get_addr to public_key class

pywallet.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #-*- coding: utf-8 -*-
-pywversion="2.1.4"
+pywversion="2.1.5"
 never_update=False
 
 #
@@ -986,10 +986,11 @@ class Signature( object ):
 		self.s = s
 
 class Public_key( object ):
-	def __init__( self, generator, point ):
+	def __init__( self, generator, point, c=None ):
 		self.curve = generator.curve()
 		self.generator = generator
 		self.point = point
+		self.compressed = c
 		n = generator.order()
 		if not n:
 			raise RuntimeError, "Generator point must have order."
@@ -1012,6 +1013,17 @@ class Public_key( object ):
 		v = xy.x() % n
 		return v == r
 
+	def ser(self):
+		if self.compressed:
+			pk=('%02x'%(2+(self.point.y()&1))) + '%064x' % self.point.x()
+		else:
+			pk='04%064x%064x' % (self.point.x(), self.point.y())
+
+		return pk.decode('hex')
+
+	def get_addr(self, v=0):
+		return public_key_to_bc_address(self.ser(), v)
+
 class Private_key( object ):
 	def __init__( self, public_key, secret_multiplier ):
 		self.public_key = public_key