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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _init_command(self, action, flags=None):
        ''' a wrapper to the base init_command, ensuring that "oci" is added
            to each command

            Parameters
            ==========
            action: the main action to perform (e.g., build)
            flags: one or more additional flags (e.g, volumes) 
                   not implemented yet.

        '''
        from spython.main.base.command import init_command
        if not isinstance(action, list):
            action = [action]
        cmd = ['oci'] + action
        return init_command(self, cmd, flags)