CODEWITHSUNDEEP
pythonqueue
IARI
IARI

Reputation: 1377

Put multiple items in a python queue

Suppose you have an iterable items containing items that should be put in a queue q. Of course you can do it like this:

for i in items:
    q.put(i)

But it feels unnecessary to write this in two lines - is that supposed to be pythonic? Is there no way to do something more readable - i.e. like this

q.put(*items)

Upvotes: 15

Views: 23593

Answers (3)

Frank He
Frank He

Reputation: 11

q.extend(items)

Should be simple and Pythonic Enough

If you want it at the front of the queue

q.extendleft(items)

Python Docs:

https://docs.python.org/2/library/collections.html#collections.deque.extend

Upvotes: -3

FunkySayu
FunkySayu

Reputation: 8061

Using the built-in map function :

map(q.put, items)

It will apply q.put to all your items in your list. Useful one-liner.

For Python 3, you can use it as following :

list(map(q.put, items))

Or also :

from collections import deque
deque(map(q.put, items))

But at this point, the for loop is quite more readable.

Upvotes: 16

Cyphase
Cyphase

Reputation: 12002

What's unreadable about that?

for i in items:
    q.put(i)

Readability is not the same as "short", and a one-liner is not necessarily more readable; quite often it's the opposite.

If you want to have a q.put(*items)-like API, consider making a short helper function, or subclassing Queue.

Upvotes: 2

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