Troubles with detector module

[davidam]

I've the next problem:

davidam@debian:~/git/python-examples$ pip install sexmachine
Requirement already satisfied: sexmachine in /usr/local/lib/python2.7/dist-packages

davidam@debian:~/git/python-examples$ python sexmachine.py
Traceback (most recent call last):
File "sexmachine.py", line 1, in
import sexmachine.detector as gender
File "/home/davidam/git/python-examples/sexmachine.py", line 1, in
import sexmachine.detector as gender
ImportError: No module named detector

The source code is:

$ cat sexmachine.py
import sexmachine.detector as gender
d = gender.Detector()
if (d.get_gender(u"Bob") == 'male'):
print("Python")
elif (d.get_gender(u"Sally") == 'female'):
print("Shell")
else:
print("PHP")

Regards.