code: def call(self, transaction=None, block_identifier='latest'):
          
          if transaction is None:
              call_transaction = {}
          else:
              call_transaction = dict(**transaction)
  
          if 'data' in call_transaction:
              raise ValueError("Cannot set data in call transaction")
  
          if self.address:
              call_transaction.setdefault('to', self.address)
          if self.web3.eth.defaultAccount is not empty:
              call_transaction.setdefault('from', self.web3.eth.defaultAccount)
  
          if 'to' not in call_transaction:
              if isinstance(self, type):
                  raise ValueError(
                      "When using `Contract.[methodtype].[method].call()` from"
                      " a contract factory you "
                      "must provide a `to` address with the transaction"
                  )
              else:
                  raise ValueError(
                      "Please ensure that this contract instance has an address."
                  )
  
          block_id = parse_block_identifier(self.web3, block_identifier)
  
          return call_contract_function(
              self.web3,
              self.address,
              self._return_data_normalizers,
              self.function_identifier,
              call_transaction,
              block_id,
              self.contract_abi,
              self.abi,
              *self.args,
              **self.kwargs
          )
docs: Execute a contract function call using the `eth_call` interface.
  
          This method prepares a ``Caller`` object that exposes the contract
          functions and public variables as callable Python functions.
  
          Reading a public ``owner`` address variable example:
  
          .. code-block:: python
  
              ContractFactory = w3.eth.contract(
                  abi=wallet_contract_definition["abi"]
              )
  
              # Not a real contract address
              contract = ContractFactory("0x2f70d3d26829e412A602E83FE8EeBF80255AEeA5")
  
              # Read "owner" public variable
              addr = contract.functions.owner().call()
  
          :param transaction: Dictionary of transaction info for web3 interface
          :return: ``Caller`` object that has contract public functions
              and variables exposed as Python methods