Python示例，用于unpack元组或序列或可迭代，以便该元组可能长于N个元素，从而导致“ 太多的值无法unpack ”异常。

1.打开任意长度的元组

Python“ star expressions”可用于unpack任意长度的元组。

example1.py

>>> employee = ('Lokesh', 'email@example.com', '111-222-333', '444-555-666')

>>> name, email, *phone_numbers = employee

>>> name

'Lokesh'

>>> email

'email@example.com'

>>> phone_numbers

['111-222-333', '444-555-666']

example2.py

>>> *elements, end = [1,2,3,4,5,6,7,8]

>>> elements

[1,2,3,4,5,6,7]

>>> end

8

2.unpack元组并丢弃不想要的值

If there is a mismatch in the number of elements, you’ll get an error.

example3.py

>>> record = ('Lokesh', 37, 72.45, (1, 1, 1981))

>>> name, *_, (*_, year) = record #Only read name and year

>>> name

'Lokesh'

>>> year

1981

学习愉快！