store mac address

[ashtonn@gmail.com]

Hello,
I am trying to fill an array with source and destination mac address.
The first 6 bytes hold the destination mac address and the next six
bytes hold the source mac address. Here's a snippet for filling in
broadcast address for the destination mac.

# Get destination address
data = array('B', '\0' * 512)
for i in range(6):
    data[i] = 0xFF

How do i fill in a command line passed mac address for both source and
destination(default is FFFFFFFFFFFF). The first six bytes of data[i]
should contain destination mac and the next six bytes of data[i] should
contain the source mac address.

Thanks,
Ashton