Dumb question - can I write standalone python script to run without arcgis?
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05-18-2010 11:54 PM
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Frank...unfortunately it doesn't print to other IDE's output...don't use console...too dark and gloomy and reminds me of the old DOS days
Pycharm / Komodo python IDE's are fine with the message printing(I assume wingide is too) :cool: IDLE/pywin32 is not an IDE, they are mistakes.
If you really want a decent Python IDE i honestly suggest looking into PyCharm (try it for 30 days, its also 50% off right now). If you don't want to spend money then i suggest NetBeans, or PyScripter. (I refuse to acknowledge pydev since its based off the horror that is known as eclipse).
It's for that reason that I wrote my own message(), warning() and error() methods. In addition to logging to a text file, it's exactly 3 places that I need to change if I need print statements or not, not dozens of lines littered throughout the script.
Most of the time I don't need print messages, but if I'm debugging in PyScripter or PythonWin (but not winpdb which runs the script in a separate console window from the GUI), I'll uncomment my print statement in each of the 3 methods.# Helper methods for writing messages, warnings and errors to the geoprocessor as well as a logfile # By default, prepends a timestamp to the message; set second argument to 0 or False to disable def message(strMessage, stamp = True): global gp, logFile if stamp == True: strMessage = time.asctime() + " - " + strMessage #print strMessage gp.AddMessage(strMessage) if logFile: logFile.write(strMessage + "\n") logFile.flush() def warning(strMessage, stamp = True): global gp, logFile if stamp == True: strMessage = time.asctime() + " - " + strMessage #print strMessage gp.AddWarning(strMessage) if logFile: logFile.write(strMessage + "\n") logFile.flush() def error(strMessage, stamp = True): global gp, logFile if stamp == True: strMessage = time.asctime() + " - " + strMessage #print strMessage gp.AddError(strMessage) if logFile: logFile.write(strMessage + "\n") logFile.flush()
You should really look into the python logging, its wonderful: http://docs.python.org/library/logging.html
However you need to create a gp friendly logger... heres an example:
import logging
import sys
_GP_MESSAGE_DEFS = {
logging.CRITICAL : "AddError",
logging.ERROR : "AddError",
logging.WARNING : "AddWarning",
logging.INFO : "AddMessage",
logging.DEBUG : "AddMessage",
}
class GPHandler(logging.Handler):
"""
Geoprocessor friendly logging module
"""
def __init__(self, level=logging.NOTSET, gp=None):
self.gp = gp
logging.Handler.__init__(self, level)
def emit(self, record):
"""
Woop.
"""
message = self.format(record)
if self.gp:
source = gp
else:
source = __import__("arcpy")
# retrive the functor and call it with the message
getattr(source, _GP_MESSAGE_DEFS[record.levelno])(message)
_logger = logging.getLogger("test")
_logger.setLevel(logging.DEBUG)
# sadily i have no idea where this object type is located
if type(sys.stdout) != "<type 'geoprocessing sys.stdout object'>":
handler = logging.StreamHandler()
else:
# change for arc9.3
handler = GPHandler()
handler.setFormatter(logging.Formatter("%(asctime)10s | %(name)s | %(message)s",
"%Y%m%d %H:%M:%S"))
_logger.addHandler(handler)
_logger.debug("Message")
_logger.info("Info message")
_logger.warning("Warning")
_logger.error("error")
_logger.critical("error")This gives an output of:
20101103 21:36:45 | test | Message 20101103 21:36:52 | test | Info message WARNING: 20101103 21:36:52 | test | Warning ERROR: 20101103 21:36:52 | test | error ERROR: 20101103 21:36:52 | test | error
If you run it from not within arcmap it goes to normal console streams. If you run it via arcgis it goes to the gp addmessage/etc.
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