Alright, you've now changed your original post, so that it is now clear to me that you have a main script and a required module. Maybe that was clear before your changes, but, if so, I clearly did not pick it up.
Well, in this case, yes, using the our function (instead of my) does make sense, it can make the variable available in both code files. Sorry if my previous answer was wrong, I did not understand the full context.
Although, to tell the truth, I am almost never using our to share variables between different compile units. I tend to prefer to create setter and accessor functions and to export explicitly these subroutines, rather than the variables.
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