ZeroDivisionError:float division by zero

[annni1]

file:util.py
function:average_precision()
question1:The problem of ZeroDiVisionError:float Division by Zero often occurs in the function that calculates the average precision of each class in the util.py file.Maybe because pos_count is always zero.The program did not perform +1 operation.
How to solve excuse me?
question2:If label==1 was found in two places in the function average_precision() code. Is there an error here?

[sorrowyn]

voc2012 ?
http://host.robots.ox.ac.uk:8080/

[Wollytt]

Having the same issue here, how did you fix it? Thanks!!