Operator

operator — Standard operators as functions

Getter & Caller

import operator

# lambda s: (s[1], s[5], s[9])
get = operator.itemgetter(1, 5, 9)
print(get(range(20, 40)))   # (21, 25, 29)

import operator

# lambda s: (s.start, s.stop, s.step)
get = operator.attrgetter('start', 'stop', 'step')
print(get(range(20, 40)))   # (20, 40, 1)

import operator

# lambda s: s.values()
call = operator.methodcaller('values')
data = { i: i**2 for i in range(10) }
print(call(data))   # dict_values([0, 1, 4, 9, 16, 25, 36, 49, 64, 81])

Inplace Operators

import operator

a = '123'
operator.iadd(a, 'test')
# a : '123'

b = [1, 2, 3]
operator.iadd(a, [4, 5, 6])
# a : [1, 2, 3, 4, 5, 6]