Python 3.3 Define Function and Default Argument Values

Define Function：

def Binomial(n, m):
 if( n == m  or m ==0):
  return 1
 else:
  return (Binomial(n - 1, m) + Binomial(n - 1, m - 1))

print(Binomial(5,3))

Default Argument Values：

def Binomial(n = 5, m = 3):
 if( n == m  or m ==0):
  return 1
 else:
  return (Binomial(n - 1, m) + Binomial(n - 1, m - 1))

print(Binomial())

參考資料：
http://docs.python.org/3/tutorial/controlflow.html#defining-functions
http://writecodepeople.blogspot.tw/2013/07/binomial-coefficient.html