how to print the element at front of a queue python 3? [duplicate]

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This question already has an answer here:

examining items in a python Queue

2 answers





    import queue

    q = queue.Queue()

    q.put(5)

    q.put(7)

print(q.get()) removes the element at front of the queue. How do i print this element without removing it? Is it possible to do so?

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

marked as duplicate by slider, Community♦ Nov 10 at 10:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you're not using your queue as an inter-thread communication mechanism, you should be using collections.deque, not queue.Queue. If you are using your queue to communicate between threads, then a peek operation is rarely useful or safe for such use cases, and you should think carefully about whether you need it.
– user2357112
Nov 10 at 0:39

add a comment |

up vote
-1
down vote

favorite

This question already has an answer here:

examining items in a python Queue

2 answers





    import queue

    q = queue.Queue()

    q.put(5)

    q.put(7)

print(q.get()) removes the element at front of the queue. How do i print this element without removing it? Is it possible to do so?

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

marked as duplicate by slider, Community♦ Nov 10 at 10:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you're not using your queue as an inter-thread communication mechanism, you should be using collections.deque, not queue.Queue. If you are using your queue to communicate between threads, then a peek operation is rarely useful or safe for such use cases, and you should think carefully about whether you need it.
– user2357112
Nov 10 at 0:39

add a comment |

up vote
-1
down vote

favorite

This question already has an answer here:

examining items in a python Queue

2 answers





    import queue

    q = queue.Queue()

    q.put(5)

    q.put(7)

print(q.get()) removes the element at front of the queue. How do i print this element without removing it? Is it possible to do so?

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

This question already has an answer here:

examining items in a python Queue

2 answers





    import queue

    q = queue.Queue()

    q.put(5)

    q.put(7)

print(q.get()) removes the element at front of the queue. How do i print this element without removing it? Is it possible to do so?

This question already has an answer here:

examining items in a python Queue

2 answers

python python-3.x syntax queue python-collections

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

edited Nov 10 at 0:35

asked Nov 10 at 0:29

Ankit Jain

asked Nov 10 at 0:29

Ankit Jain

asked Nov 10 at 0:29

Ankit Jain

marked as duplicate by slider, Community♦ Nov 10 at 10:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by slider, Community♦ Nov 10 at 10:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you're not using your queue as an inter-thread communication mechanism, you should be using collections.deque, not queue.Queue. If you are using your queue to communicate between threads, then a peek operation is rarely useful or safe for such use cases, and you should think carefully about whether you need it.
– user2357112
Nov 10 at 0:39

add a comment |

If you're not using your queue as an inter-thread communication mechanism, you should be using collections.deque, not queue.Queue. If you are using your queue to communicate between threads, then a peek operation is rarely useful or safe for such use cases, and you should think carefully about whether you need it.
– user2357112
Nov 10 at 0:39

If you're not using your queue as an inter-thread communication mechanism, you should be using collections.deque, not queue.Queue. If you are using your queue to communicate between threads, then a peek operation is rarely useful or safe for such use cases, and you should think carefully about whether you need it.
– user2357112
Nov 10 at 0:39

add a comment |

1 Answer
1

active

oldest

votes

up vote
-1
down vote

accepted

The Queue object has a collections.deque object attribute. Please see the Python documentation on accessing elements of the deque in regards to efficiency. A list may be a better use-case if you need to access elements randomly.

import queue



if __name__ == "__main__":

    q = queue.Queue()

    q.put(5)

    q.put(7)



    """

    dir() is helpful if you don't want to read the documentation

    and just want a quick reminder of what attributes are in your object

    It shows us there is an attribute named queue in the Queue class

    """

    for attr in dir(q):

        print(attr)



    #Print first element in queue

    print("nLooking at the first element")

    print(q.queue[0])



    print("nGetting the first element")

    print(q.get())



    print("nLooking again at the first element")

    print(q.queue[0])

Note: I have abbreviated the output from the dir iterator

>>>

put

put_nowait

qsize

queue

task_done

unfinished_tasks



Looking at the first element

5



Getting the first element

5



Looking again at the first element

7

>>>

answered Nov 10 at 0:59

Kristian

1054

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
-1
down vote

accepted

import queue



if __name__ == "__main__":

    q = queue.Queue()

    q.put(5)

    q.put(7)



    """

    dir() is helpful if you don't want to read the documentation

    and just want a quick reminder of what attributes are in your object

    It shows us there is an attribute named queue in the Queue class

    """

    for attr in dir(q):

        print(attr)



    #Print first element in queue

    print("nLooking at the first element")

    print(q.queue[0])



    print("nGetting the first element")

    print(q.get())



    print("nLooking again at the first element")

    print(q.queue[0])

Note: I have abbreviated the output from the dir iterator

>>>

put

put_nowait

qsize

queue

task_done

unfinished_tasks



Looking at the first element

5



Getting the first element

5



Looking again at the first element

7

>>>

answered Nov 10 at 0:59

Kristian

1054

add a comment |

up vote
-1
down vote

accepted

import queue



if __name__ == "__main__":

    q = queue.Queue()

    q.put(5)

    q.put(7)



    """

    dir() is helpful if you don't want to read the documentation

    and just want a quick reminder of what attributes are in your object

    It shows us there is an attribute named queue in the Queue class

    """

    for attr in dir(q):

        print(attr)



    #Print first element in queue

    print("nLooking at the first element")

    print(q.queue[0])



    print("nGetting the first element")

    print(q.get())



    print("nLooking again at the first element")

    print(q.queue[0])

Note: I have abbreviated the output from the dir iterator

>>>

put

put_nowait

qsize

queue

task_done

unfinished_tasks



Looking at the first element

5



Getting the first element

5



Looking again at the first element

7

>>>

answered Nov 10 at 0:59

Kristian

1054

add a comment |

up vote
-1
down vote

accepted

import queue



if __name__ == "__main__":

    q = queue.Queue()

    q.put(5)

    q.put(7)



    """

    dir() is helpful if you don't want to read the documentation

    and just want a quick reminder of what attributes are in your object

    It shows us there is an attribute named queue in the Queue class

    """

    for attr in dir(q):

        print(attr)



    #Print first element in queue

    print("nLooking at the first element")

    print(q.queue[0])



    print("nGetting the first element")

    print(q.get())



    print("nLooking again at the first element")

    print(q.queue[0])

Note: I have abbreviated the output from the dir iterator

>>>

put

put_nowait

qsize

queue

task_done

unfinished_tasks



Looking at the first element

5



Getting the first element

5



Looking again at the first element

7

>>>

answered Nov 10 at 0:59

Kristian

1054

import queue



if __name__ == "__main__":

    q = queue.Queue()

    q.put(5)

    q.put(7)



    """

    dir() is helpful if you don't want to read the documentation

    and just want a quick reminder of what attributes are in your object

    It shows us there is an attribute named queue in the Queue class

    """

    for attr in dir(q):

        print(attr)



    #Print first element in queue

    print("nLooking at the first element")

    print(q.queue[0])



    print("nGetting the first element")

    print(q.get())



    print("nLooking again at the first element")

    print(q.queue[0])

Note: I have abbreviated the output from the dir iterator

>>>

put

put_nowait

qsize

queue

task_done

unfinished_tasks



Looking at the first element

5



Getting the first element

5



Looking again at the first element

7

>>>

answered Nov 10 at 0:59

Kristian

1054

answered Nov 10 at 0:59

Kristian

1054

answered Nov 10 at 0:59

Kristian

1054

answered Nov 10 at 0:59

Kristian

1054

add a comment |

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