New in version 2.0.
True when expr is equivalent to an integer and can be written without recourse to ties:
abjad> from abjad.tools import mathtools
abjad> for n in range(0, 16 + 1):
... print '%s\t%s' % (n, mathtools.is_assignable_integer(n))
...
0 False
1 True
2 True
3 True
4 True
5 False
6 True
7 True
8 True
9 False
10 False
11 False
12 True
13 False
14 True
15 True
16 True
Otherwise false.
Return boolean.
Changed in version 2.0: renamed mathtools.is_assignable() to mathtools.is_assignable_integer().