Tim Johnson wrote:
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.
The pychecker warning is just advisory. You can ignore it if you like.
But using "dummy" or "_" a variable name you don't care about is good
practice, as it tells the reader that they don't need to care about that
variable.
On a related note: from the python interpreter if I do
help(_)
I get
Help on bool object:
This is a side-effect of a feature used in the Python interpreter. _ is
used to hold the last result:
>>> 1 + 1
2
>>> _
2
>>> ['x', 3] + [None, 4]
['x', 3, None, 4]
>>> _
['x', 3, None, 4]
So it's just a coincidence that when you called help(_) the previous
command happened to result in True or False. If you try again now,
you'll probably get something completely different.
--
Steven
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