Evgeny Kapun added the comment:
There are methods that accept a single argument and behave like a binary
operation or a predicate. It would be useful to be able to turn them into
binary functions for use with higher-order functions like map and reduce:
reduce(methodcaller("combine"), objs) # reduce a sequence using "combine"
method
map(methodcaller("combine"), alist, blist) # combine pairs of elements
all(map(methodcaller("compatible_with"), alist, blist)) # check that pairs
of elements are compatible
This functionality is already available for overloaded operators, because
operator module provides them as functions. Some methods behave similarly to
operators, so I think that a similar functionality should be available for them
as well.
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<http://bugs.python.org/issue25454>
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