Connecting to the Celo Network from Python using web3

example.py

import web3

min_registry_abi = [
    {
        "name": "getAddressForString",
        "constant": True,
        "inputs": [{
            "type": "string"
        }],
        "outputs": [{
            "type": "address"
        }],
        "type": "function"
    },
]

min_reserve_abi = [{
    "name": "getReserveGoldBalance",
    "constant": True,
    "inputs": [],
    "outputs": [{
        "type": "uint256"
    }],
    "type": "function"
}, {
    "name": "getUnfrozenReserveGoldBalance",
    "constant": True,
    "inputs": [],
    "outputs": [{
        "type": "uint256"
    }],
    "type": "function"
}, {
    "name": "getAssetAllocationSymbols",
    "constant": True,
    "inputs": [],
    "outputs": [{
        "type": "bytes32[]"
    }],
    "type": "function"
}, {
    "name": "getAssetAllocationWeights",
    "constant": True,
    "inputs": [],
    "outputs": [{
        "type": "uint256[]"
    }],
    "type": "function"
}]



_REGISTRY_ADDR = '0x000000000000000000000000000000000000ce10'
_CGLD_DECIMAL_UNITS = 18

node_url = "https://rc1-forno.celo-testnet.org"

_w3 = web3.Web3(web3.Web3.HTTPProvider(node_url))
_w3.middleware_onion.inject(web3.middleware.geth_poa_middleware, layer=0)

_registry_contract = _w3.eth.contract(address=_REGISTRY_ADDR, abi=min_registry_abi)
_reserve_addr = _registry_contract.functions.getAddressForString('Reserve').call()
_reserve_contract = _w3.eth.contract(address=_reserve_addr, abi=min_reserve_abi)

last_block = _w3.eth.getBlock(_w3.eth.blockNumber)
print(f"Last block in node is #{last_block}")

reserve_frozen_gold_balance_ = _reserve_contract.functions.getUnfrozenReserveGoldBalance().call() / pow(10, _CGLD_DECIMAL_UNITS)
print(f"Unfrozen Balance in reserve is: {reserve_frozen_gold_balance_}")