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Source code for galaxy.util.none_like

"""
Objects with No values
"""

from galaxy.datatypes.registry import Registry
from galaxy.model.metadata import MetadataCollection


[docs]class RecursiveNone: def __str__( self ): return "None" def __repr__( self ): return str( self ) def __getattr__( self, name ): value = RecursiveNone() setattr( self, name, value ) return value def __nonzero__( self ): return False
[docs]class NoneDataset( RecursiveNone ):
[docs] def __init__( self, datatypes_registry=None, ext='data', dbkey='?' ): self.ext = self.extension = ext self.dbkey = dbkey if datatypes_registry is None: # Default Value Required for unit tests datatypes_registry = Registry() datatypes_registry.load_datatypes() self.datatype = datatypes_registry.get_datatype_by_extension( ext ) self._metadata = None self.metadata = MetadataCollection( self )
def __getattr__( self, name ): return "None"
[docs] def missing_meta( self ): return False