"Or you can use the familiar #! trick 
 #!/usr/local/bin/python print "Hello World""
 
 
Tuples are like lists, but size is fixed at time of creation. CanŐt replace members (said to be "immutable") 

Returning multiple values 
 def divide(a,b):     q = a/b 
     r = a - q*b     return q,r 
  x,y = divide(42,5)       # x = 8, y = 2 


 string.atof(s)             # Convert to float 
 string.atoi(s)             # Convert to integer 
 string.atol(s)             # Convert to long 
 string.count(s,pattern)    # Count occurrences of pattern in s 
 string.find(s,pattern)     # Find pattern in s 
 string.split(s, sep)       # String a string 
 string.join(strlist, sep)  # Join a list of string 
 string.replace(s,old,new)  # Replace occurrences of old with new 
 
 1A socket is a file-like object. Allows data to be sent and received across the network like a file. 
But it also includes functions to accept and establish connections. Before two machines can establish a connection, both must create a socket object.