How do you write code for type conversion in Python?

In Python, type conversion can be achieved using built-in type conversion functions. Here are some common type conversion functions and sample code:

1. Convert the string to an integer.

string = "123"
integer = int(string)
print(integer)  # 输出: 123

1. Convert the string to a floating-point number:

string = "3.14"
float_num = float(string)
print(float_num)  # 输出: 3.14

1. Convert integers or floating-point numbers to strings.

number = 123
string = str(number)
print(string)  # 输出: "123"

float_num = 3.14
string = str(float_num)
print(string)  # 输出: "3.14"

1. Convert a string to a boolean value.

string = "True"
boolean = bool(string)
print(boolean)  # 输出: True

string = "False"
boolean = bool(string)
print(boolean)  # 输出: False

注意，进行强制类型转换时必须确保原值与目标类型匹配，否则可能会出错。转换字符串为数字（整数或浮点数）时，字符串必须表示有效数字；转换字符串为布尔值时，字符串必须是“True”或“False”。