error bluetooth

[Luca Sanna]

the code is output the error of the ubuntu

from bluetooth import *

target_name = "My Phone"
target_address = None

nearby_devices = discover_devices()

for address in nearby_devices:
    if target_name == lookup_name( address ):
        target_address = address
        break

if target_address is not None:
    print "found target bluetooth device with address", target_address
else:
    print "could not find target bluetooth device nearby"

the error

luca at luca-XPS-M1330:~/py-temperature/py-temperature$ python bluetooth.py
Traceback (most recent call last):
  File "bluetooth.py", line 14, in <module>
    from bluetooth import *
  File "/home/luca/py-temperature/py-temperature/bluetooth.py", line 19, in <module>
    nearby_devices = discover_devices()
NameError: name 'discover_devices' is not defined
luca at luca-XPS-M1330:~/py-temperature/py-temperature$ 

it's a bug of the module? thanks