I am struggling trying to add a coin to abe block explorer

here is the bitcoin sample i am struggling to replicate

    # Main Bitcoin chain:
    if tx_hash_hex == "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b":
        return "01000000010000000000000000000000000000000000000000000000000000000000000000fffff fff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c 6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b7 3ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909 a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11 d5fac00000000"


the  if tx_hash_hex == "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b": is the merkle root, what i don't get is where this return "" number comes from ?

this is the link to the GitHub https://github.com/bitcoin-abe/bitcoin-abe/blob/master/Abe/genesis_tx.py

Can someone shed some light on this please ? , i have googled the crap out of this and can't find much

thanks