main.py 文件源码

def __init__(self):
        self.fork_blocks = {}

        if not is_pyevm_available():
            raise pkg_resources.DistributionNotFound(
                "The `py-evm` package is not available.  The "
                "`PyEVMBackend` requires py-evm to be installed and importable. "
                "Please install the `py-evm` library."
            )

        self.reset_to_genesis()

    #
    # Private Accounts API
    #