CODEWITHSUNDEEP
pythonarraysslice
Frank
Frank

Reputation: 66214

Discontiguous array slices in Python

I would like to get an array slice that has two (or more) discontiguous parts.

Example:

>>> a=range(100)
>>> a[78:80; 85:97] # <= invalid syntax
[78, 79, 85, 86]

That syntax is not accepted. What's the best way to do it?

UPDATE: Above example was on int, but I'd primarily like this to work on strings.

Example:

>>> a="a b c d e f g".split()
>>> a[1:3; 4:6]
['b', 'c', 'e', 'f']

Upvotes: 2

Views: 971

Answers (2)

sshashank124
sshashank124

Reputation: 32189

An alternative to sberry's answer (although I personally think his is better): Maybe you can use itemgetter:

from operator import itemgetter

a="a b c d e f g".split()

>>> print itemgetter(*range(1,3)+range(4,6))(a)
['b', 'c', 'e', 'f']

OR

from operator import itemgetter

a="a b c d e f g".split()

items = itemgetter(*range(1,3)+range(4,6))

>>> print items(a)
['b', 'c', 'e', 'f']

Upvotes: 1

sberry
sberry

Reputation: 132078

What about

>>> a = range(100)
>>> a[78:80] + a[85:97]
[78, 79, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96]

Update: Not sure what you want as the output for your string example:

>>> import string
>>> a = list(string.lowercase[:7])
>>> a[1:3] + a[4:6]
['b', 'c', 'e', 'f']

Upvotes: 4

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