random...@fastmail.us writes:
> On Wed, Oct 8, 2014, at 15:38, Ethan Furman wrote:
> > The main reason I bother using the operator module is for the
> > readability of not seeing the dunders, and the writability of not
> > having to type them.
>
> I'm not sure what situation you would have to type them (as opposed to
> simply a + b) that the operator module would help with.
Any situation where you need to refer to a function. ‘+’ is not a
function, whereas ‘operator.add’ is.
import operator
import functools
add_three = functools.partial(operator.add, 3)
foo = list(range(10))
bar = map(add_three, foo)
The above ‘map’ invocation – which is useful because it allows any
arbitrary one-parameter function to be used – cannot be used with ‘+’,
which is not a function.
Likewise, ‘functools.partial’ requires a function, and ‘+’ is not a
function.
There are countless such uses for the functions in the ‘operator’
module.
--
\ “It is the integrity of each individual human that is in final |
`\ examination. On personal integrity hangs humanity's fate.” |
_o__) —Richard Buckminster Fuller, _Critical Path_, 1981 |
Ben Finney
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