python切片复制列表的本质

names = ["Jerry", "Tom"]

names_copy = names[:]

names.append("Ann")

names_copy.append("Bob")

print(f"names：{names}")

print(f"names_copy：{names_copy}")

# output:

# names：['Jerry', 'Tom', 'Ann']

# names_copy：['Jerry', 'Tom', 'Bob']