Opencv, CV2. Puttext() usage

these basic functions are lost for a while, and then forgotten.

cv2.putText(I,'there 0 error(s):',(50,150),cv2.FONT_HERSHEY_COMPLEX,6,(0,0,255),25)

each parameter is in order: photo/added text/upper-left coordinates/font/font size/color/font thickness

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