Sign bare MULTISIG 2 of 3 input

bare_multisig.py

>>> from pybtc import *
>>>
>>> # first  step we need create 2 of 3 multisig output and add same btc 
>>> 
>>> a1 = Address("cPBuqn4ZsddXunx6EEev6khbfUzFnh3xxdEUPCrm5uy9qGcmbBEt",
                 address_type="P2PKH", testnet=True)
>>> a2 = Address("cVgShyj2q4YKFX8VzCffuQcrJVYhp522NFozNi7ih2KgNVbnysKX",
                 address_type="P2PKH", testnet=True)
>>> a3 = Address("cQWBhFENcN8bKEBsUHvpCyCfWVHDLfn1M65Gd6nenQkpEqL4DNUH",
                 address_type="P2PKH", testnet=True)
>>> script = b"".join([OP_2,
                       op_push_data(a1.public_key.key),
                       op_push_data(a2.public_key.key),
                       op_push_data(a3.public_key.key), 
                       OP_3, OP_CHECKMULTISIG])
>>> # script for 2 of 3 multisig ready
>>> 
>>> a1.address
'mwJMtn5hW54pJC748EExvhRm6FRVmUZXQt'
>>> # add 0.65 btc from testnet faucet to this address
>>> # faucet tx d791f8386516bc464e7702159775734559d884a3fd50e45191c6207cdedac8ae
>>> # then sent this bitcoins to our multisig script
>>> tx = Transaction(testnet=True)
>>> tx.add_input("d791f8386516bc464e7702159775734559d884a3fd50e45191c6207cdedac8ae", 0)
>>> tx.add_output(64000000, script_pub_key=script)
>>> tx.sign_input(0, private_key="cPBuqn4ZsddXunx6EEev6khbfUzFnh3xxdEUPCrm5uy9qGcmbBEt",
                  address="mwJMtn5hW54pJC748EExvhRm6FRVmUZXQt")
>>> tx.serialize()
"""
0100000001aec8dade7c20c69151e450fda384d859457375971502774e46bc166538f891d7000000006a473
04402200edb1ded443ea8015390c38afeb0564b52f6f9895c45952461f6ccfaf6639b8402206c0d3bfd2f7d
8c68d5cc3c774a9403d843cd27e33148927e3f575607b91d05c2012103b4603330291721c0a8e9cae65124a
7099ecf0df3b46921d0e30c4220597702cbffffffff010090d0030000000069522103b4603330291721c0a8
e9cae65124a7099ecf0df3b46921d0e30c4220597702cb2102b2ec7de7e811c05aaf8443e3810483d5dbcf6
71512d9999f9c9772b0ce9da47a2102c711ad61c9fbd3600716b981d101cf0a000ab3524525235c42f2cbcd
8c17c6da53ae00000000
"""
>>> # broadcast this tx to network and we got bitcoins on our multisig script
>>> # tx cfe002d20590e2400a26b2dd9e2e6af2369cbb1f5442af286485841798590068
>>> # lets do our main task sign multisig input
>>>
>>> tx = Transaction(testnet=True)
>>> tx.add_input("cfe002d20590e2400a26b2dd9e2e6af2369cbb1f5442af286485841798590068", 0)
>>> tx.add_output(63000000, address="mwJMtn5hW54pJC748EExvhRm6FRVmUZXQt")
>>> tx.sign_input(0, private_key=["cPBuqn4ZsddXunx6EEev6khbfUzFnh3xxdEUPCrm5uy9qGcmbBEt",
                                  "cVgShyj2q4YKFX8VzCffuQcrJVYhp522NFozNi7ih2KgNVbnysKX"],
                   script_pub_key=script)
>>> tx.serialize()
"""
0100000001680059981784856428af42541fbb9c36f26a2e9eddb2260a40e29005d202e0cf00000000930048
3045022100a7383d84ee35fb965978144d9243ca0892a1be81ce70058e70b2ba1ea5a762a7022058647d131f
cec2e3a63e57fa475b779b94c81a95b5c164fdfdbcee0124e3448c01483045022100b3945861a5a8a406bd57
5857e19accdb0f6385ebf1c02938b35462cddeef400802205857f56d83e9ed7e98082d9127b8934262d3a046
1429747e865b06345bbf8f9e01ffffffff01c04dc103000000001976a914ad204de226b3d11a70dc53b4998f
4603e138ff3f88ac00000000
"""

>>> # in pybtc implemented order independent signing multisig algorithm

>>> # first private key owner is Alice and second owner is Bob
>>> alice_key = "cPBuqn4ZsddXunx6EEev6khbfUzFnh3xxdEUPCrm5uy9qGcmbBEt"
>>> bob_key = "cVgShyj2q4YKFX8VzCffuQcrJVYhp522NFozNi7ih2KgNVbnysKX"

>>> # Bob make fist turn and sign transaction with his key
>>> tx = Transaction(testnet=True)
>>> tx.add_input("cfe002d20590e2400a26b2dd9e2e6af2369cbb1f5442af286485841798590068", 0)
>>> tx.add_output(63000000, address="mwJMtn5hW54pJC748EExvhRm6FRVmUZXQt")
>>> tx.sign_input(0, private_key=bob_key, script_pub_key=script)
>>> bob_half_signed_tx = tx.serialize()
>>> # at this point bob sent half signed transaction to Alice

>>> # Alice turn
>>> tx = Transaction(bob_half_signed_tx, testnet=True)
>>> tx.sign_input(0, private_key=alice_key, script_pub_key=script)
>>> completed_tx = tx.serialize()
>>> # Alice broadcast transaction to network

Would it be possible to have the same sending to bare multisig please?
Or using a solution which would works offline and work also for Litecoin or Zcash?