Python > tuple > tuple unpacking

@ Introducing Python: Modern Computing in Simple Packages by Bill Lubanovic
(No. 1466 / 12833)

This is sometimes called tuple unpacking.

例

>>> marx_tuple = ( 'Groucho', 'Chico', 'Harpo' )
>>> a, b, c = marx_tuple
>>> a
'Groucho'
>>> b
'Chico'
>>> c
'Harpo'

tupleのN番目の項目チェックなどに便利なのだろうか。

marx_tuple = ( 'Groucho', 'Chico', 'Harpo' )
print(marx_tuple)

_, item2nd, _ = marx_tuple
print(item2nd)

if 'co' in item2nd:
    print('co inside')

結果

Success time: 0 memory: 23304 signal:0
('Groucho', 'Chico', 'Harpo')
Chico
co inside