The unpacking assignment assigns elements of a tuple/list to variables at once.

In [1]:

x, y, z = (1, 2, 3)
print(x)
print(y)
print(z)

1
2
3

Use _ to capture values to be ignored.

In [3]:

x, y, _ = (1, 2, 3)
print(x)
print(y)

1
2

A variable prefixed with * captures all left values.

In [6]:

x, *y, z = (1, 2, 3, 4)
print(x)
print(y)
print(z)

1
[2, 3]
4

* and _ can be combined togerther to ignore multiple values.

In [2]:

x, *_, z = (1, 2, 3, 4)
print(x)
print(z)

1
4

References¶

Ben Chuanlong Du's Blog