def intelligentcompare(s1, s2, ignorecase = False):
"""\
This function automatically detects numerical string for intelligent comparison.
>>> cmp('2. a title of 2nd chapter', '10. a title of 10th chapter')
1
>>> intelligentcompare('2. a title of 2nd chapter', '10. a title of 10th chapter')
-1
>>> cmp('2.0', '2')
1
>>> intelligentcompare('2.0', '2')
0
>>> cmp(2.0, 2)
0
>>> intelligentcompare(2.0, 2)
0
"""
if type(s1) not in types.StringTypes or type(s2) not in types.StringTypes:
return cmp(s1, s2)
compare = ignorecase and (lambda i, j: cmp(i.lower(), j.lower())) or cmp
t1 = filter(None, pattern_of_numeric.split(s1))
t2 = filter(None, pattern_of_numeric.split(s2))
if len(t1) != len(t2):
return compare(s1, s2)
for i in xrange(len(t1)):
c = 0
try:
c = cmp(float(t1[i]), float(t2[i]))
except ValueError:
c = compare(t1[i], t2[i])
if c != 0:
return c
return 0
