du dumma hua

Always load libraries at the beginning of your code. The reason is two-fold: those reading your code know exactly what libraries you are using, and it increases the efficiency of your functions (as the function would have to check if that library was loaded everytime it was called).

I have a more basic question. Is it better to import the library before the function or in the function? Normally I call it in the function, but for more complex problems I would load it at the start.