/usr/lib/python2.7/dist-packages/networkx/exception.py is in python-networkx 1.8.1-0ubuntu3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # -*- coding: utf-8 -*-
"""
**********
Exceptions
**********
Base exceptions and errors for NetworkX.
"""
__author__ = """Aric Hagberg (hagberg@lanl.gov)\nPieter Swart (swart@lanl.gov)\nDan Schult(dschult@colgate.edu)\nLoïc Séguin-C. <loicseguin@gmail.com>"""
# Copyright (C) 2004-2011 by
# Aric Hagberg <hagberg@lanl.gov>
# Dan Schult <dschult@colgate.edu>
# Pieter Swart <swart@lanl.gov>
# All rights reserved.
# BSD license.
#
# Exception handling
# the root of all Exceptions
class NetworkXException(Exception):
"""Base class for exceptions in NetworkX."""
class NetworkXError(NetworkXException):
"""Exception for a serious error in NetworkX"""
class NetworkXPointlessConcept(NetworkXException):
"""Harary, F. and Read, R. "Is the Null Graph a Pointless Concept?"
In Graphs and Combinatorics Conference, George Washington University.
New York: Springer-Verlag, 1973.
"""
class NetworkXAlgorithmError(NetworkXException):
"""Exception for unexpected termination of algorithms."""
class NetworkXUnfeasible(NetworkXAlgorithmError):
"""Exception raised by algorithms trying to solve a problem
instance that has no feasible solution."""
class NetworkXNoPath(NetworkXUnfeasible):
"""Exception for algorithms that should return a path when running
on graphs where such a path does not exist."""
class NetworkXUnbounded(NetworkXAlgorithmError):
"""Exception raised by algorithms trying to solve a maximization
or a minimization problem instance that is unbounded."""
class NetworkXNotImplemented(NetworkXException):
"""Exception raised by algorithms not implemented for a type of graph."""
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