Hi all you experts,
This has me beat. Has anyone any ideas about what might be going wrong?
This is code from within a windows service (hence no print statements -
no sys.stdout to print on!).
I am trying to trace through to find where the code is not working. No
stdout so I have to log to a file.
I have the following code fragments.
def log(message):
f = open('d:\logfile.txt','a')
f.write(message + "\n")
f.close()
from DelNotePrinter import DelNotePrinter
note the order of the above - log is defined before the import.
Later in the source I have
log('disPrint is:'+disPrint)
log('count is:'+count)
log(repr(DelNotePrinter))
printer = DelNotePrinter(disPrint,int(count))
The DelNotePrinter.py file cannot us log even though it is declared
as global. The code is...
# coding=utf8
# DelNotePrinter = code to print delivery notes
assorted imports removed for space reasons
class DelNotePrinter(object):
''' Print Delivery Note on A5 in portrait '''
def __init__(self,printer,copies):
''' create printer and painter '''
global font,sm,log
log('DelNotePrinter: starting')
self.printer = QPrinter(QPrinter.HighResolution)
etc
The file the log writes contains..
disPrint is:HP Deskjet 6940 series
count is:1
<class 'DelNotePrinter.DelNotePrinter'>
The > is followed by a newline and end of file! Where is the
DelNotePrinter: starting message?
If I replace the opening of __init__ with
global font,sm,log
f = open('d:\logfile.txt','a')
f.write('DelNotePrinter: starting' + "\n")
f.close()
self.printer = QPrinter(QPrinter.HighResolution)
then the message IS written to the log file.
I have read http://docs.python.org/reference/simple_stmts.html#global
very carefully and I still don't understand.
Regards
Ian
p.s. There are no trackbacks, no events on the event log, and no error
messages I have been able to find. When run as a script (not a service)
DelNotePrinter does produce the expected printout.
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