context.py

names = []

def print_them():
    for name in names:
          print("name:", name)
               
def add_them():
    names.append("Peter")
    names.append("Hasan")
    
def main():
    add_them()
    print_them()
    
if __name__ == "__main__":
    main()

prop-drilling.py

def print_them(names):
    for name in names:
          print("name:", name)

def add_them():
    names = []
    names.append("Peter")
    names.append("Hasan")
    return names

def main():
    names = add_them()
    print_them(names)

if __name__ == "__main__":
    main()