wehub-resource-sync
44 lines
1018 B
Python
44 lines
1018 B
Python
"""
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**********
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Exceptions
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**********
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Base exceptions and errors for EasyGraph.
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"""
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__all__ = [
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"EasyGraphException",
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"EasyGraphError",
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"EasyGraphNotImplemented",
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"EasyGraphPointlessConcept",
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]
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class EasyGraphException(Exception):
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"""Base class for exceptions in EasyGraph."""
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class EasyGraphError(EasyGraphException):
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"""Exception for a serious error in EasyGraph"""
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class EasyGraphNotImplemented(EasyGraphException):
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"""Exception raised by algorithms not implemented for a type of graph."""
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class EasyGraphPointlessConcept(EasyGraphException):
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"""Raised when a null graph is provided as input to an algorithm
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that cannot use it.
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The null graph is sometimes considered a pointless concept [1]_,
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thus the name of the exception.
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References
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----------
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.. [1] Harary, F. and Read, R. "Is the Null Graph a Pointless
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Concept?" In Graphs and Combinatorics Conference, George
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Washington University. New York: Springer-Verlag, 1973.
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"""
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