将行列数不规则的矩阵与python中的列表进行比较

import numpy as np

# 不规则矩阵示例
irregular_matrix = [
    [1, 2, 3],
    [4, 5],
    [6, 7, 8, 9]
]

# Python列表示例
python_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# 访问不规则矩阵的元素
print(irregular_matrix[0][1])  # 输出: 2
print(irregular_matrix[1][1])  # 输出: 5

# 访问Python列表的元素
print(python_list[1])  # 输出: 2

# 使用NumPy处理矩阵
np_matrix = np.array([
    [1, 2, 3],
    [4, 5, 0],  # 填充0以创建规则矩阵
    [6, 7, 8]
])

print(np_matrix[1, 1])  # 输出: 5

def convert_to_regular_matrix(irregular_matrix):
    max_cols = max(len(row) for row in irregular_matrix)
    regular_matrix = [row + [0] * (max_cols - len(row)) for row in irregular_matrix]
    return np.array(regular_matrix)

regular_np_matrix = convert_to_regular_matrix(irregular_matrix)
print(regular_np_matrix)