How can I use SetJob in win32print?

问题

I want to clear or delete print jobs using Python. But how can I get JobID?

win32print.SetJob(hPrinter, JobID , Level , JobInfo , Command)

How could I run this code?

jobs = []
for p in win32print.EnumPrinters(win32print.PRINTER_ENUM_LOCAL,None, 1):
    flags, desc, name, comment = p

    pHandle = win32print.OpenPrinter(name)
    print = list(win32print.EnumJobs(pHandle, 0, -1, 1))
    jobs.extend(print)
    SetJob(pHandle, id, 1,JOB_CONTROL_DELETE)
    #where should i get id from?
    win32print.ClosePrinter(pHandle)

回答1:

Starting from your code, I've managed to create a small script that deletes any print job on any (local) printer (I've tested it and it works).

Here it is (I've run it with Py35):

import win32print

if __name__ == "__main__":

    printer_info_level = 1

    for printer_info in win32print.EnumPrinters(win32print.PRINTER_ENUM_LOCAL, None, printer_info_level):
        name = printer_info[2]
        #print(printer_info)
        printer_handle = win32print.OpenPrinter(name)
        job_info_level = 1
        job_info_tuple = win32print.EnumJobs(printer_handle, 0, -1, job_info_level)
        #print(type(job_info_tuple), len(job_info_tuple))
        for job_info in job_info_tuple:
            #print("\t", type(job_info), job_info, dir(job_info))
            win32print.SetJob(printer_handle, job_info["JobId"], job_info_level, job_info, win32print.JOB_CONTROL_DELETE)
        win32print.ClosePrinter(printer_handle)

Notes:

• What I said in my comment (about iterating over printers) still stands, but I suppose that is beyond the scope of this question
• I've improved the script a little bit:
  • Give (more) meaningful names to variables
  • Use variables instead of plain numbers to increase code readability
  • Other small corrections
  • Probably, it could use some exception handling
• The secret of the script consist of:
  • EnumJobs returning a tuple of dictionaries (where each dictionary wraps an [MSDN]: JOB_INFO_1 structure - for job_info_level = 1), or (obviously) an empty tuple if there are no queued jobs for the printer
  • How the information from EnumJobs is passed to SetJob:
    • The JobID argument (that you asked about) is job_info["JobId"] (check previous bullet)
    • Also notice the next 2 arguments: Level and JobInfo

来源：https://stackoverflow.com/questions/44109985/how-can-i-use-setjob-in-win32print