def get_lines(file_name: str) -> [str]:
"""
This function returns the lines from the file as a list.
It handles the opening and closing of the file.
Also, the function assumes the file exists and can be read.
"""
with open(file_name, 'r') as f:
lines = f.readlines()
return lines
# How to use:
lines = get_lines('my_file.txt')
f = open("filename")
lines = f.readlines()