diff --git a/week0003/vietthaotran/python/week0003.py b/week0003/vietthaotran/python/week0003.py
new file mode 100644
index 0000000..1da470a
--- /dev/null
+++ b/week0003/vietthaotran/python/week0003.py
@@ -0,0 +1,69 @@
+import sys
+
+class Client (object):
+	def __init__(self, name, amount):
+		self.name = name
+		self.amount = amount
+
+	def deposit(self, amount):
+		if amount > 0:
+			self.amount += amount
+			return 'True'
+		else:
+			return 'False'
+
+	def withdraw(self, amount):
+		if 0 < amount <= self.amount:
+			self.amount -= amount
+			return 'True'
+		else:
+			return 'False'
+
+class FinTech (object):
+	def __init__(self):
+		self.clients = {}
+
+	def addClient (self, name, amount):
+		if name in self.clients:
+			return 'False'
+		else:
+			client = Client(name, amount)
+			self.clients[name] = client
+			return 'True'
+
+	def deposit(self, name, amount):
+		if name in self.clients:
+			client = self.clients[name]
+			return client.deposit(amount)
+		else:
+			return 'False'
+
+	def withdraw(self, name, amount):
+		if name in self.clients:
+			client = self.clients[name]
+			return client.withdraw(amount)
+		else:
+			return 'False'
+
+	def processRequest(self, input):
+		for line in input:
+			request = line.split(" ")
+			action = request[0]
+			name = request[1].lower()
+			amount = float(request[2])
+			if amount > 0:
+				if action == 'A':
+					print self.addClient(name, amount)
+				elif action == 'D':
+					print self.deposit(name, amount)
+				elif action == 'W':
+					print self.withdraw(name, amount)
+				else:
+					print 'Invalid'
+			else:
+				print 'Invalid'
+ 
+
+if __name__ == '__main__':
+	finTech = FinTech()
+	finTech.processRequest(sys.stdin)