Using Queue in python

Question

I\'m trying to run the following in Eclipse (using PyDev) and I keep getting error :

q = queue.Queue(maxsize=0) NameError: global name \'queue\' is not defined<

Answer 1

You do

from queue import *

This imports all the classes from the queue module already. Change that line to

q = Queue(maxsize=0)

CAREFUL: "Wildcard imports (from import *) should be avoided, as they make it unclear which names are present in the namespace, confusing both readers and many automated tools". (Python PEP-8)

As an alternative, one could use:

from queue import Queue

q = Queue(maxsize=0)

Answer 2

That's because you're using : from queue import *

and then you're trying to use :

queue.Queue(maxsize=0) 

remove the queue part, because from queue import * imports all the attributes to the current namespace. :

Queue(maxsize=0) 

or use import queue instead of from queue import *.

Answer 3

If you import from queue import * this is mean that all classes and functions importing in you code fully. So you must not write name of the module, just q = Queue(maxsize=100). But if you want use classes with name of module: q = queue.Queue(maxsize=100) you mast write another import string: import queue, this is mean that you import all module with all functions not only all functions that in first case.

Answer 4

You Can install kombu with pip install kombu

and then Import queue Just like this

from kombu import Queue

Answer 5

make sure your code is not under queue.py rename it to something else. if your file name is queue.py it will try to search in the same file.