def partition(tree):
'''Measures the distribution of sections
to the children subtrees at each bifurcation point.
Partition is defined as the max/min number of sections
between the children subtrees of a bifurcation point.
Returns:
List of partition for each bifurcation point.
'''
def partition_at_point(bif_point):
'''Partition at each bif point.'''
n = float(n_sections(bif_point.children[0]))
m = float(n_sections(bif_point.children[1]))
return max(n, m) / min(n, m)
return [partition_at_point(i)
for i in tr.ibifurcation_point(tree)]
def n_bifurcations(tree):
"""
Return number of bifurcations in tree
"""
return sum(1 for _ in tr.ibifurcation_point(tree))
