How do you define an empty array in Python?

In Python, there are two ways to define an empty array: 1. Use empty brackets `[]` to define an empty list (which is an array).

my_array = []

2. Use the `array` function from the `array` module, specifying an empty string as the type code, to define an empty array.

import array
my_array = array.array('')  # 空字符串指示不指定类型码

Both of these methods will create an empty array, so you can choose either one based on your needs.