如何在python中将变量转换为字符串

num = 42
string_num = str(num)
print(string_num)  # 输出 "42"

name = "Alice"
age = 30

# 使用 format() 函数
formatted_string = "My name is {} and I am {} years old.".format(name, age)
print(formatted_string)  # 输出 "My name is Alice and I am 30 years old."

# 使用 f-string
formatted_string = f"My name is {name} and I am {age} years old."
print(formatted_string)  # 输出 "My name is Alice and I am 30 years old."

num = 42
string_num = repr(num)
print(string_num)  # 输出 "42"