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I wrote a program which work but without using self and now i try to rewrite it with "self". I put some self pretty much everywhere but i have a problem of given argument. First i create a class:

class photo():
    def _init_cam(self,x,y):
        self.camera = PiCamera()
        self.camera.resolution = (x,y)
        self.camera.start_preview()
        sleep(2)
        print("camera init")
        return self.camera

The method which give me problems :

def capture_image(self):
        global wait # Empeche le if de ce déclencher avant la fin de la fonction
        wait = False 
        # Get the current date as the timestamp to generate unique file names.
        self.date = datetime.datetime.now().strftime('%m-%d-%Y_%H.%M.%S')
        # Add date as timestamp on the generated files.
        #camera.annotate_text = date
        # Capture an image as the thumbnail.
        self.camera.capture('/home/pi/Pictures/' + self.date + '.jpg')
        print("\r\nImage Captured! \r\n")
        wait = True

In my main I create my object :

camera =photo()
camera._init_cam(3280,2464)

Then I call my method :

GPIO.add_event_detect(23,GPIO.FALLING,callback = camera.capture_image, bouncetime = 300)

The error : TypeError: capture_image() takes 1 positional argument but 2 were given

I have no idea why it gives a second argument and if there is any way to see what is this argument.

Thanks.

Hyderman
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1 Answers1

1

As per the example in the Threaded Callbacks section here, the callback is passed a parameter that they've named channel. Documentation for that library seems sparse though so I can't tell you what the parameter means.

Kemp
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