dummy, underscore and unused local variables

[Tim Johnson]

Consider the following code:
for i in range(mylimit):
foo()
running pychecker gives me a
"""
Local variable (i) not used
"""
complaint.
If I use
for dummy in range(mylimit):
....
## or
for _ in range(mylimit):
....
I get no complaint from pychecker.
I would welcome comments on best practices for this issue.
NOTE: I see much on google regarding unused local variables,
however, doing a search for 'python _' hasn't proved fruitful.

I would like to see comments here specifically on the use for `range'

On a related note: from the python interpreter if I doI get
Help on bool object:

class bool(int)
| bool(x) -> bool
......
I'd welcome comments on this as well.

I expect to be edified is so many ways, some
of them unexpected.

thanks

 

[Steven D'Aprano]

Consider the following code:

[...]

You know Tim, if you hadn't blocked my email address in a fit of pique
over something that didn't even involve you, you would have seen my
answer to your question on the (e-mail address removed) mailing list yesterday.

http://code.activestate.com/lists/python-tutor/83236/

Yes, I realise that Tim probably won't see this either. I'm just making a
point.