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opencv-python>>Template Matching with Multiple Objects

in the example,what does pt[0] and pt[1] mean??

for pt in zip(*loc[::-1]): cv2.rectangle(img, pt, (pt[0] + w, pt[1] + h), (0,0,255), 2) counter=counter+1

Umm...I guess it means initial point in the picture,but how do program know the initial point should be?

Can anyone help me to answer my question? Thank you in advance.

opencv-python>>Template Matching with Multiple Objects

in the example,what does pt[0] pt[0] and pt[1] pt[1] mean??

for pt in zip(*loc[::-1]):
  cv2.rectangle(img, pt, (pt[0] + w, pt[1] + h), (0,0,255), 2)
 counter=counter+1

counter=counter+1

Umm...I guess it means initial point in the picture,but how do program know the initial point should be?

Can anyone help me to answer my question? Thank you in advance.