How to declare and assign variables in Python?

In Python, variables can be declared and assigned in one line or separately.

Complete the declaration and assignment in one line.

variable_name = value

Separate the declaration and assignment.

variable_name = None  # 声明变量并初始化为None
variable_name = value  # 给变量赋值

In Python, the type of a variable is automatically inferred based on the value assigned to it. Therefore, there is no need to specify the type of variable when declaring it.