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The right way to add scriptsig to coinbase utilizing bitcoin core script

In blocktools.py in bitcoin core github , there may be this script to generate coinbase

def create_coinbase(peak, pubkey=None, extra_output_script=None, charges=0, nValue=50):
“””Create a coinbase transaction.
If pubkey is handed in, the coinbase output can be a P2PK output;
in any other case an anyone-can-spend output.
If extra_output_script is given, make a 0-value output to that
script. That is helpful to pad block weight/sigops as wanted. “””
coinbase = CTransaction()
coinbase.vin.append(CTxIn(COutPoint(0, 0xffffffff), script_BIP34_coinbase_height(peak), 0xffffffff))
coinbaseoutput = CTxOut()
coinbaseoutput.nValue = nValue * COIN
if nValue == 50:
halvings = int(peak / 150) # regtest
coinbaseoutput.nValue >>= halvings
coinbaseoutput.nValue += charges
if pubkey shouldn’t be None:
coinbaseoutput.scriptPubKey = key_to_p2pk_script(pubkey)
else:
coinbaseoutput.scriptPubKey = CScript([OP_TRUE])
coinbase.vout = [coinbaseoutput]
if extra_output_script shouldn’t be None:
coinbaseoutput2 = CTxOut()
coinbaseoutput2.nValue = 0
coinbaseoutput2.scriptPubKey = extra_output_script
coinbase.vout.append(coinbaseoutput2)
coinbase.calc_sha256()
return coinbase

Nevertheless it does not have scriptsig on the tactic argument , and the one worth within the scriptsig is script_BIP34_coinbase_height(peak). How do i modify the python script in order that i can append a scriptsig that i create ? If potential , with examples.

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