3.8. Accessing Parts Through Index NumbersΒΆ

New in version 2.10.0.

Another way to access parts of a version is to use an index notation. The underlying Version object allows to access its data through the magic method __getitem__().

For example, the major part can be accessed by index number 0 (zero). Likewise the other parts:

>>> ver = Version.parse("10.3.2-pre.5+build.10")
>>> ver[0], ver[1], ver[2], ver[3], ver[4]
(10, 3, 2, 'pre.5', 'build.10')

If you need more than one part at the same time, use the slice notation:

>>> ver[0:3]
(10, 3, 2)

Or, as an alternative, you can pass a slice() object:

>>> sl = slice(0,3)
>>> ver[sl]
(10, 3, 2)

Negative numbers or undefined parts raise an IndexError exception:

>>> ver = Version.parse("10.3.2")
>>> ver[3]
Traceback (most recent call last):
IndexError: Version part undefined
>>> ver[-2]
Traceback (most recent call last):
IndexError: Version index cannot be negative