Buon pomeriggio, c'è qualcuno che gentilmente mi può spiegare questo programma? non dico riga per riga ma quasi

import argparse
import base64
import picamera

from googleapiclient import discovery
from oauth2client.client import GoogleCredentials

def takephoto():
camera = picamera.PiCamera()
camera.capture('image.jpg')

def main():
takephoto() # First take a picture
"""Run a label request on a single image"""

credentials = GoogleCredentials.get_application_default()
service = discovery.build('vision', 'v1', credentials=credentials)

with open('image.jpg', 'rb') as image:
image_content = base64.b64encode(image.read())
service_request = service.images().annotate(body={
'requests': [{
'image': {
'content': image_content.decode('UTF-8')
},
'features': [{
'type': 'LOGO_DETECTION',
'maxResults': 1
}]
}]
})
response = service_request.execute()

print response

if __name__ == '__main__':
main()