Get Polkadot txHash by block number and height

get_txhash.py

# pip install substrate-interface
from substrateinterface import SubstrateInterface

substrate = SubstrateInterface(
    url="https://rpc.polkadot.io"
)

block_number = 11542800
number = 2

# Get block hash by number
block_hash = substrate.get_block_hash(block_number)

# Retrieve extrinsics in block
result = substrate.get_block(block_hash=block_hash)

print(result['extrinsics'][number])
print(result['extrinsics'][number].extrinsic_hash.hex())