def data_to_degseq(data, graph6=None):
"""
Convert a database integer data type to a degree sequence list.
INPUT:
- ``data`` -- integer data type (one digit per vertex representing its
degree, sorted high to low) to be converted to a degree sequence list
- ``graph6`` -- string (default: ``None``); the ``graph6`` identifier is
required for all graphs with no edges, so that the correct number of zeros
is returned.
EXAMPLES::
sage: from sage.graphs.graph_database import data_to_degseq
sage: data_to_degseq(3221)
[1, 2, 2, 3]
sage: data_to_degseq(0, 'D??')
[0, 0, 0, 0, 0]
"""
degseq = Integer(data).digits(10)
if not degseq:
# compute number of 0's in list from graph6 string
from sage.graphs.generic_graph_pyx import length_and_string_from_graph6
return length_and_string_from_graph6(str(graph6))[0] * [0]
else:
return degseq
def data_to_degseq(data, graph6=None):
"""
Takes the database integer data type (one digit per vertex
representing its degree, sorted high to low) and converts it to
degree sequence list. The graph6 identifier is required for all
graphs with no edges, so that the correct number of zeros will be
returned.
EXAMPLE::
sage: from sage.graphs.graph_database import data_to_degseq
sage: data_to_degseq(3221)
[1, 2, 2, 3]
sage: data_to_degseq(0,'D??')
[0, 0, 0, 0, 0]
"""
degseq = Integer(data).digits(10)
if not degseq:
# compute number of 0's in list from graph6 string
from sage.graphs.generic_graph_pyx import length_and_string_from_graph6
return length_and_string_from_graph6(str(graph6))[0]*[0]
else:
return degseq