Another dumb scope question for a closure.

[Steven W. Orr]

So sorry because I know I'm doing something wrong.

574 > cat c2.py
#! /usr/local/bin/python2.4

def inc(jj):
def dummy():
jj = jj + 1
return jj
return dummy

h = inc(33)
print 'h() = ', h()
575 > c2.py
h() =
Traceback (most recent call last):
File "./c2.py", line 10, in ?
print 'h() = ', h()
File "./c2.py", line 5, in dummy
jj = jj + 1
UnboundLocalError: local variable 'jj' referenced before assignment

I could have sworn I was allowed to do this. How do I fix it?

--
Time flies like the wind. Fruit flies like a banana. Stranger things have .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net

 

[Waldemar Osuch]

So sorry because I know I'm doing something wrong.

574 > cat c2.py
#! /usr/local/bin/python2.4

def inc(jj):
def dummy():
jj = jj + 1
return jj
return dummy

h = inc(33)
print 'h() = ', h()
575 > c2.py
h() =
Traceback (most recent call last):
File "./c2.py", line 10, in ?
print 'h() = ', h()
File "./c2.py", line 5, in dummy
jj = jj + 1
UnboundLocalError: local variable 'jj' referenced before assignment

I could have sworn I was allowed to do this. How do I fix it?

I have seen this approach on ActiveState Cookbook but can not find a
reference to it right now.
.... def dummy():
.... dummy.jj += 1
.... return dummy.jj
.... dummy.jj = jj
.... return dummy
....14

Waldemar

 

[Waldemar Osuch]

I have seen this approach on ActiveState Cookbook but can not find a
reference to it right now.


... def dummy():
... dummy.jj += 1
... return dummy.jj
... dummy.jj = jj
... return dummy
...>>> h = inc(33)

14

Waldemar

Here it is:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/474122