Python变量和方括号

# 创建一个整数列表
numbers = [1, 2, 3, 4, 5]

# 访问列表中的元素
print(numbers[0])  # 输出: 1

# 修改列表中的元素
numbers[1] = 10
print(numbers)  # 输出: [1, 10, 3, 4, 5]

# 添加元素到列表末尾
numbers.append(6)
print(numbers)  # 输出: [1, 10, 3, 4, 5, 6]

# 删除列表中的元素
del numbers[2]
print(numbers)  # 输出: [1, 10, 4, 5, 6]

# 遍历列表中的元素
for num in numbers:
    print(num)

numbers = [1, 2, 3]
print(numbers[3])  # 引发 IndexError: list index out of range

if len(numbers) > 3:
    print(numbers[3])
else:
    print("索引越界")

mixed_list = [1, "apple", 3.14]
mixed_list[1][0] = "A"  # 引发 TypeError: 'str' object does not support item assignment

mixed_list[1] = "Apple"
print(mixed_list)  # 输出: [1, 'Apple', 3.14]