unpack without using * (asterisk)-CodePudding

If I want to keep things functional, and do not want to use * in the middle, then what is the equivalent substitute function? for example,

import operator as op
print(op.eq(*map(str.upper, ['a', 'A'])))

how do I avoid using * here?

I created a function, like,

def unpack(args):
  return *args

but it gives syntax error, print(*args) works but return fails

CodePudding user response：

functools.reduce can be used to apply a function of two arguments to an iterable cumulatively, which would work for your example case

import operator as op
from functools import reduce
print(reduce(op.eq, map(str.upper, ['a', 'A'])))

CodePudding user response：

You could use reduce to check if all of the mapped elements are equal to each other:

from functools import reduce
print(reduce(op.eq, map(str.upper, ['a', 'A']), True))

I'm not convinced that's the right thing to do, though. If your plan is to call op.eq with exactly two operands, no more and no less, then unpacking with * is appropriate. Even in a functional context.