python - Write to NSLog and file PythonObjC -

i'm trying modify script additionally print log file. uses nslog(). i'm still learning python... anyways, here's have far:

# cocoa_keypress_monitor.py bjarte johansen licensed under  # license: http://ljos.mit-license.org/  appkit import nsapplication, nsapp foundation import nsobject, nslog cocoa import nsevent, nskeydownmask pyobjctools import apphelper import sys  class appdelegate(nsobject):     def applicationdidfinishlaunching_(self, notification):         mask = nskeydownmask         nsevent.addglobalmonitorforeventsmatchingmask_handler_(mask, handler)  def handler(event):     try:         nslog(u"%@", event)         open("/users/zachary/downloads/foo.txt", "a", 0) myfile:             myfile.write(u"%@", event)     except keyboardinterrupt:         apphelper.stopeventloop()  def main():     app = nsapplication.sharedapplication()     delegate = appdelegate.alloc().init()     nsapp().setdelegate_(delegate)     apphelper.runeventloop()  if __name__ == '__main__':     main() 

as can see, attempted pass myfile.write() same data nslog(), python doesn't , don't know how properly.

the argument file.write() not a format string nslog()'s argument, it's single regular string. need coerce nsevent object string, passing python's str() function. (pyobjc knows call objective-c object's -description method, nslog() does, in situation.)

you should note %@ not valid format specifier python format strings: used in objc. actually, preferred format string syntax in python doesn't use percent escapes. if wanted format nsevent python string explicitly, like: "{}".format(event)