1行Python搞定高频任务！26个实用技巧解决日常+进阶需求

numbers = [1, 2, 3, 4, 5]
average = sum(numbers) / len(numbers)

my_list = ['Hello', 'world']
stringified = ' '.join(my_list)

numbers = [3, 1, 4, 1, 5, 9, 2, 6]
max_value = max(numbers)

s = "12345"
is_all_digits = all(c.isdigit() for c in s)

my_string = "hello"
reversed_string = my_string[::-1]

numbers = [1, 2, 3]
squared = [n**2 for n in numbers]

def is_prime(n):
    return all(n % i for i in range(2, int(n**0.5) + 1)) and n > 1

my_string = "hello"
unique_chars = ''.join(sorted(set(my_string)))

text = "hello world"
count = text.count('o')

with open('example.txt', 'r') as file:
    lines = file.readlines()

def quick_sort(lst):
    return sorted(lst)

fibonacci = lambda n: [0, 1] + [fibonacci(i - 1)[-1] + fibonacci(i - 2)[-1] for i in range(2, n)]

my_dict = {'a': 1, 'b': 2}
swapped = {v: k for k, v in my_dict.items()}

set1 = {1, 2, 3}
set2 = {2, 3, 4}
intersection = set1 & set2

s = "12345"
int_list = list(map(int, s))

import random
random_number = random.randint(1, 100)

from random import shuffle
s = "hello"
shuffled = ''.join(shuffle(list(s), random.random))

seconds = 3661
hours, remainder = divmod(seconds, 3600)
minutes, seconds = divmod(remainder, 60)
time_format = f"{hours}:{minutes}:{seconds}"

year = 2020
is_leap = year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)

nested_list = [[1, 2], [3, 4, 5], [6]]
flattened = [item for sublist in nested_list for item in sublist]

from concurrent.futures import ThreadPoolExecutor
def square(n):
    return n ** 2
numbers = [1, 2, 3, 4]
with ThreadPoolExecutor() as executor:
    results = list(executor.map(square, numbers))

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print("Something is happening before the function is called.")
        result = func(*args, **kwargs)
        print("Something is happening after the function is called.")
        return result
    return wrapper
@my_decorator
def say_hello(name):
    return f"Hello, {name}!"
print(say_hello("World"))

data = (x for x in range(1000000) if x % 2 == 0)
for even_number in data:
    print(even_number)

result = None
try:
    result = 10 / 0
except ZeroDivisionError:
    result = "Can't divide by zero."
print(result)

numbers = [1, 2, 3, 4, 5]
even_numbers = [x for x in numbers if x % 2 == 0]

class CountDown:
    def __init__(self, start):
        self.start = start
    def __iter__(self):
        return self
    def __next__(self):
        if self.start <= 0:
            raise StopIteration
        self.start -= 1
        return self.start + 1
for number in CountDown(5):
    print(number)