Is Print Management Service Examples working?

[BJladika]

https://pydicom.github.io/pynetdicom/stable/examples/print.html
I tried to follow this example, but encountered different obstacles.

First 1st step (checking status) originally had no successfull outcome. It would always get fail. But its easily fixable. Okay...

Secondly, 2nd step (getting film session) somehow gets empty dataset (film session) so when I try generate film box it crashes because it can't get ReferencedSOPClassUID and ReferencedSOPInstanceUID (and fails to get film box).

Am I doing something wrong?

Tried on real printer DryStar 5302 and on virtual printer (Print SCP) from CharruaSoft (their Print Server). Pynetdicom version 2.0.2 and pydicom is 2.3.0 with Windows 10 (Superior OS)

[BJladika]

After minor adjusment of example (because of not getting affected sop instance, and also somehow generated uid could be rejected) it started to work, kinda, although I have encountered with another issue

import sys

from pydicom import dcmread
from pydicom.dataset import Dataset
from pydicom.uid import generate_uid

from pynetdicom import AE, evt, debug_logger
from pynetdicom.sop_class import (
    BasicGrayscalePrintManagementMeta,
    BasicFilmSession,
    BasicFilmBox,
    BasicGrayscaleImageBox,
    Printer,
    PrinterInstance
)

debug_logger()

# The SOP Instance containing the grayscale image data to be printed
DATASET = dcmread('path/to/file.dcm')


def build_session():
    """Return an N-CREATE *Attribute List* for creating a Basic Film Session

    Returns
    -------
    pydicom.dataset.Dataset
        An N-CREATE *Attribute List* dataset that can be used to create a
        *Basic Film Session SOP Class* instance.
    """
    attr_list = Dataset()
    attr_list.NumberOfCopies = '1'  # IS
    attr_list.PrintPriority = 'LOW'  # CS
    attr_list.MediumType = 'PAPER'  # CS
    attr_list.FilmDestination = 'SOMEWHERE'  # CS
    attr_list.FilmSessionLabel = 'TEST JOB'  # LO
    attr_list.MemoryAllocation = ''  # IS
    attr_list.OwnerID = 'PYNETDICOM'  # SH

    return attr_list


def build_film_box(session):
    """Return an N-CREATE *Attribute List* for creating a Basic Film Box.

    In this example we just have a single Image Box.

    Parameters
    ----------
    session : pydicom.dataset.Dataset
        The *Basic Film Session SOP Class* instance returned by SCP in
        response to the N-CREATE request that created it.

    Returns
    -------
    pydicom.dataset.Dataset
        An N-CREATE *Attribute List* dataset that can be used to create a
        *Basic Film Box SOP Class* instance.
    """
    # The "film" consists of a single Image Box
    attr_list = Dataset()
    attr_list.ImageDisplayFormat = 'STANDARD\1,1'
    attr_list.FilmOrientation = 'PORTRAIT'
    attr_list.FilmSizeID = 'A4'

    # Can only contain a single item, is a reference to the *Film Session*
    attr_list.ReferencedFilmSessionSequence = [Dataset()]
    item = attr_list.ReferencedFilmSessionSequence[0]
    item.ReferencedSOPClassUID = session.SOPClassUID
    item.ReferencedSOPInstanceUID = session.SOPInstanceUID

    return attr_list


def build_image_box(im):
    """Return an N-SET *Attribute List* for updating a Basic Grayscale Image Box

    Parameters
    ----------
    im : pydicom.dataset.Dataset
        The SOP Instance containing the pixel data that is to be printed.

    Returns
    -------
    pydicom.dataset.Dataset
        An N-SET *Attribute List* dataset that can be used to update the
        *Basic Grayscale Image Box SOP Class* instance.
    """
    attr_list = Dataset()
    attr_list.ImageBoxPosition = 1  # US

    # Zero or one item only
    attr_list.ReferencedImageBoxSequence = [Dataset()]
    item = attr_list.ReferencedImageBoxSequence[0]
    item.SamplesPerPixel = im.SamplesPerPixel
    item.PhotometricInterpretation = im.PhotometricInterpretation
    item.Rows = im.Rows
    item.Columns = im.Columns
    item.BitsAllocated = im.BitsAllocated
    item.BitsStored = im.BitsStored
    item.HighBit = im.HighBit
    item.PixelRepresentation = im.PixelRepresentation
    item.PixelData = im.PixelData

    return attr_list

def handle_n_er(event):
    """Ignore the N-EVENT-REPORT notification"""
    return 0x0000

handlers = [(evt.EVT_N_EVENT_REPORT, handle_n_er)]

ae = AE()
ae.add_requested_context(BasicGrayscalePrintManagementMeta)
assoc = ae.associate("127.0.0.1", 11112, evt_handlers=handlers)

if assoc.is_established:
    # Step 1: Check the status of the printer
    # (2110,0010) Printer Status
    # (2110,0020) Printer Status Info
    # Because the association was negotiated using a presentation context
    #   with a Meta SOP Class we need to use the `meta_uid` keyword
    #   parameter to ensure we use the correct context
    status, attr_list = assoc.send_n_get(
        [0x21100010, 0x21100020],  # Attribute Identifier List
        Printer,  # Affected SOP Class UID
        PrinterInstance,  # Well-known Printer SOP Instance
        meta_uid=BasicGrayscalePrintManagementMeta
    )
    if status and status.Status == 0x0000:
        if getattr(attr_list, 'PrinterStatus', None) != "NORMAL":
            print("Printer status is not 'NORMAL'")
            assoc.release()
            sys.exit()
        else:
            print("Failed to get the printer status")
            assoc.release()
            sys.exit()
    else:
        print("Failed to get the printer status")
        assoc.release()
        sys.exit()

    print('Printer ready')
    affected_sop_instance_uid = generate_uid(prefix=None) # Affected SOP Instance UID

    # Step 2: Create *Film Session* instance
    status, film_session = assoc.send_n_create(
        build_session(),  # Attribute List
        BasicFilmSession,  # Affected SOP Class UID
        affected_sop_instance_uid,  # Affected SOP Instance UID
        meta_uid=BasicGrayscalePrintManagementMeta
    )
    film_session.SOPInstanceUID = affected_sop_instance_uid
    film_session.SOPClassUID = BasicFilmSession

    if not status or status.Status != 0x0000:
        print('Creation of Film Session failed, releasing association')
        assoc.release()
        sys.exit()

    print('Film Session created')
    
    affected_sop_instance_uid_2 = generate_uid(prefix=None)
    # Step 3: Create *Film Box* and *Image Box(es)*
    status, film_box = assoc.send_n_create(
        build_film_box(film_session),
        BasicFilmBox,
        affected_sop_instance_uid_2,
        meta_uid=BasicGrayscalePrintManagementMeta
    )
    if not status or status.Status != 0x0000:
        print('Creation of the Film Box failed, releasing association')
        assoc.release()
        sys.exit()

    print('Film Box created')

    film_box.SOPInstanceUID = affected_sop_instance_uid_2
    film_box.SOPClassUID = BasicFilmBox
    # Step 4: Update the *Image Box* with the image data
    # In this example we only have one *Image Box* per *Film Box*
    # Get the Image Box's SOP Class and SOP Instance UIDs
    item = film_box.ReferencedImageBoxSequence[0]
    status, image_box = assoc.send_n_set(
        build_image_box(DATASET),
        item.ReferencedSOPClassUID,
        item.ReferencedSOPInstanceUID,
        meta_uid=BasicGrayscalePrintManagementMeta
    )
    if not status or status.Status != 0x0000:
        print('Updating the Image Box failed, releasing association')
        assoc.release()
        sys.exit()

    print('Updated the Image Box with the image data')

    # Step 5: Print the *Film Box*
    status, action_reply = assoc.send_n_action(
        None,  # No *Action Information* needed
        1,  # Print the Film Box
        film_box.SOPClassUID,
        film_box.SOPInstanceUID,
        meta_uid=BasicGrayscalePrintManagementMeta
    )
    if not status or status.Status != 0x0000:
        print('Printing the Film Box failed, releasing association')
        assoc.release()
        sys.exit()

    # The actual printing may occur after association release/abort
    print('Print command sent successfully')

    # Optional - Delete the Film Box
    status = assoc.send_n_delete(
        film_box.SOPClassUID,
        film_box.SOPInstanceUID
    )

    # Release the association
    assoc.release()

Maybe update example?

[scaramallion]

Thanks, I don't actually have anything to test the DIMSE-N services against, so I'll update the example using your code