整理一些Python实用小技巧汇总

Python编程在各行各业应用都十分广泛,对于初学者来说,掌握一些实用的Python小技巧十分关键,它们可以帮助我们在实际的工作中提高效率。接下来笔者列举一些Python实用小技巧供各位参考:

    1.使用zip()函数来同时遍历两个或多个列表

names = ['Alice', 'Bob', 'Charlie']
ages = [25, 30, 35]

for name, age in zip(names, ages):
    print(f"{name} is {age} years old")

输出:

Alice is 25 years old
Bob is 30 years old
Charlie is 35 years old

 2. 使用enumerate()函数来遍历列表并返回元素的索引

fruits = ['apple', 'banana', 'orange']

for index, fruit in enumerate(fruits):
    print(f"Index {index}: {fruit}")

输出:

Index 0: apple
Index 1: banana
Index 2: orange

 3. 使用列表推导式来创建列表

squares = [x**2 for x in range(1, 6)]

print(squares)

输出:

[1, 4, 9, 16, 25]

 4. 使用字典推导式来创建字典

fruits = ['apple', 'banana', 'orange']
prices = [0.5, 0.25, 0.75]

fruit_prices = {fruit: price for fruit, price in zip(fruits, prices)}

print(fruit_prices)

输出:

{'apple': 0.5, 'banana': 0.25, 'orange': 0.75}

 5. 使用set()函数来去重

numbers = [1, 2, 3, 2, 1, 4, 5, 4]

unique_numbers = set(numbers)

print(unique_numbers)

输出:

{1, 2, 3, 4, 5}

 

  6. 使用in关键字来检查元素是否在列表中

fruits = ['apple', 'banana', 'orange']

if 'apple' in fruits:
    print("I found an apple!")

输出:

I found an apple!

 7. 使用sorted()函数来对列表进行排序

numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5]

sorted_numbers = sorted(numbers)

print(sorted_numbers)

输出:

[1, 1, 2, 3, 4, 5, 5, 6, 9]

 8. 使用join()函数来连接字符串列表

fruits = ['apple', 'banana', 'orange']

fruit_string = ', '.join(fruits)

print(fruit_string)

输出:

apple, banana, orange
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