20个常用的Python脚本

以下是20个常用的Python脚本示例：

1. 计算阶乘

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)

print(factorial(5))

2. 斐波那契数列

def fibonacci(n):
    if n <= 1:
        return n
    else:
        return fibonacci(n-1) + fibonacci(n-2)

print(fibonacci(10))

3. 判断素数

def is_prime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

print(is_prime(7))

4. 字符串反转

def reverse_string(s):
    return s[::-1]

print(reverse_string("hello"))

5. 字符串大小写转换

def convert_case(s, case):
    if case == "upper":
        return s.upper()
    elif case == "lower":
        return s.lower()
    else:
        return s

print(convert_case("Hello", "lower"))

6. 字符串替换

def replace_string(s, old, new):
    return s.replace(old, new)

print(replace_string("hello world", "world", "python"))

7. 列表排序

def sort_list(lst):
    return sorted(lst)

print(sort_list([3, 1, 4, 2]))

8. 列表去重

def remove_duplicates(lst):
    return list(set(lst))

print(remove_duplicates([1, 2, 2, 3, 4, 4]))

9. 列表合并

def merge_lists(lst1, lst2):
    return lst1 + lst2

print(merge_lists([1, 2, 3], [4, 5, 6]))

10. 列表切片

def slice_list(lst, start, end):
    return lst[start:end]

print(slice_list([1, 2, 3, 4, 5], 1, 4))

11. 字典键值对调换

def swap_dict(d):
    return {v: k for k, v in d.items()}

print(swap_dict({"a": 1, "b": 2, "c": 3}))

12. 计算圆的面积和周长

import math

def circle_area_circumference(radius):
    area = math.pi * radius**2
    circumference = 2 * math.pi * radius
    return area, circumference

print(circle_area_circumference(5))

13. 计算两个数的最大公约数和最小公倍数

def gcd_lcm(a, b):
    gcd = a if b == 0 else gcd_lcm(b, a % b)
    lcm = a * b // gcd
    return gcd, lcm

print(gcd_lcm(12, 18))

14. 计算矩阵乘法

def matrix_multiply(A, B):
    return [[sum(a * b for a, b in zip(row_A, col_B)) for col_B in zip(*B)] for row_A in A]

print(matrix_multiply([[1, 2], [3, 4]], [[5, 6], [7, 8]]))

15. 计算阶乘和

def factorial_sum(n):
    return sum(range(1, n+1))

print(factorial_sum(5))

16. 生成斐波那契数列的前n项

def generate_fibonacci(n):
    return [fibonacci(i) for i in range(n)]

print(generate_fibonacci(10))

17. 生成随机数列表

import random

def generate_random_list(n, start, end):
    return [random.randint(start, end) for _ in range(n)]

print(generate_random_list(5, 1, 10))

18. 生成九九乘法表

def print_multiplication_table():
    for i in range(1, 10):
        for j in range(1, i+1):
            print(f"{j}x{i}={i*j}", end="\t")
        print()

print_multiplication_table()

19. 生成随机密码

import random
import string

def generate_password(length):
    return ''.join(random.choices(string.ascii_letters + string.digits, k=length))

print(generate_password(8))

20. 生成随机字符串

import random
import string

def generate_random_string(length):
    return ''.join(random.choices(string.ascii_letters, k=length))

print(generate_random_string(8))