几个用于复习python的例子

反转字符串:

string = "Hello, World!"
reversed_string = string[::-1]
print(reversed_string)

找到列表中的最大数:

numbers = [10, 20, 5, 30, 15]
max_number = max(numbers)
print(max_number)

计算一个数字的阶乘:

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)
​
result = factorial(5)
print(result)

检查一个数字是否为质数:

def is_prime(num):
    if num < 2:
        return False
    for i in range(2, int(num**0.5) + 1):
        if num % i == 0:
            return False
    return True
​
result = is_prime(17)
print(result)

计算斐波那契数列:

def fibonacci(n):
  a = b = 1
  for i in range(n - 2):
    a, b = b, a + b
  return b
fibonacci(101)

计算字符串中字符的出现次数:

string = "Hello, World!"
char_count = string.count('l')
print(char_count)

反转列表:

my_list = [1, 2, 3, 4, 5]
reversed_list = my_list[::-1]
print(reversed_list)

从列表中删除重复项:

my_list = [1, 2, 2, 3, 4, 4, 5]
unique_list = list(set(my_list))
print(unique_list)