What does [:] mean?

Question

I\'m analyzing some Python code and I don\'t know what

pop = population[:]

means. Is it something like array lists in Java or like a bi-di

Answer 1

[:]
used for limiter or slicing in array , hash
eg:
[1:5] for displaying values between 1 inclusive and 5 exclusive i.e 1-4
[start:end]

basically used in array for slicing , understand bracket accept variable that mean value or key to display, and " : " is used to limit or slice the entire array into packets .