(field_dict, prefix)
return {
        with_prefix(k, prefix): v
        for k, v in field_dict.items()
    }
Prefix all keys in the dict.
Prefix all keys in the dict.
Prefix all keys in the dict .
def add_prefix(field_dict, prefix):
    """
    Prefix all keys in the dict.
    """
    return {
        with_prefix(k, prefix): v
        for k, v in field_dict.items()
    }
def add_prefix ( field_dict , prefix ) : return { with_prefix ( k , prefix ) : v for k , v in field_dict . items ( ) }