你真的了解Python中的f-string吗？别把自己骗了，来看看这篇全网最全的Python的f-string教程，字符串格式化让你的代码更加易读高效

name = "Alice"  
age = 30  
print(f"Name: {name}, Age: {age}")
#输出结果：Name: Alice, Age: 30

greeting = "Hello"  
target = "World"  
print(f"{greeting}, {target}!")
#输出结果：Hello, World!

a = 5  
b = 10  
# 进行算术运算  
print(f"Sum: {a + b}, Difference: {a - b}, Product: {a * b}, Quotient: {a / b}")  
# 运行结果: Sum: 15, Difference: -5, Product: 50, Quotient: 0.5

def greet(name):  
    return f"Hello, {name}!"  
  
# 调用函数  
print(f"{greet('Bob')}")  
# 运行结果: Hello, Bob!

score = 85  
# 使用条件表达式  
print(f"Grade: {'A' if score >= 90 else 'B' if score >= 80 else 'C'}")  
# 运行结果: Grade: B

numbers = [1, 2, 3, 4, 5]  
# 使用列表推导式  
print(f"Squares: {[x**2 for x in numbers]}")  
# 运行结果: Squares: [1, 4, 9, 16, 25]

keys = ['a', 'b', 'c']  
values = [1, 2, 3]  
# 使用字典推导式  
print(f"Dictionary: {{k: v for k, v in zip(keys, values)}}")  
# 注意：在f-string中，大括号需要被双写来避免被解释为格式化占位符  
# 运行结果: Dictionary: {'a': 1, 'b': 2, 'c': 3}

numbers = [1, 2, 2, 3, 4, 4, 5]  
# 使用集合推导式  
print(f"Unique numbers: {{{x for x in numbers}}}")  
# 注意：在f-string中，大括号需要被双写  
# 运行结果: Unique numbers: {1, 2, 3, 4, 5}

# 使用lambda表达式  
print(f"Result of lambda: {((lambda x: x * x)(5))}")  
# 运行结果: Result of lambda: 25

print(f"Braces: {{ }}")
#输出结果：Braces: { }

pi = 3.141592653589793  
print(f"Pi: {pi:.2f}")  # 保留两位小数  
print(f"Pi: {pi:10.2f}")  # 总宽度为10，保留两位小数，右对齐  
print(f"Pi: {pi:010.2f}")  # 总宽度为10，保留两位小数，右对齐，用0填充

Pi: 3.14  
Pi:      3.14  
Pi: 0000003.14

# 使用 .format()  
name = "Alice"  
age = 30  
print("Name: {}, Age: {}".format(name, age))  
  
# 使用 f-string  
print(f"Name: {name}, Age: {age}")